What protocol is used between a web server and its clients to establish trust? How do they negotiate and share the secret key? During the handshake process, how public key encryption algorithm is used and how private key encryption is used? In this video, you would find all these answers. Playlist: Advanced Cryptography - https://www.youtube.com/watch?v=TmA2QWSLSPg&list=PLSNNzog5eydtwsdT__t5WtRgvpfMzpTc7 Playlist: Basic Cryptography https://www.youtube.com/watch?v=vk3py9M2IfE&list=PLSNNzog5eyduN6o4e6AKFHekbH5-37BdV Please subscribe to my channel! Please leave comments or questions! Many thanks, Sunny Classroom
Views: 109309 Sunny Classroom
This is NOT an attack on TLS, just a video demonstration of a relatively unknown "feature" of Browsers. References & more info: https://jimshaver.net/2015/02/11/decrypting-tls-browser-traffic-with-wireshark-the-easy-way/ https://isc.sans.edu/forums/diary/Psst+Your+Browser+Knows+All+Your+Secrets/16415/
Views: 41412 eliasatnapier
https://8gwifi.org/docs/tlsv13.jsp how ssl works, the handshake procedure, wireshark tutorial packet analysis of ssl session ssl packet structure
Views: 46080 Zariga Tongy
How to setup browser (environmental variable) in order to decrypt SSL/TLS Browser Traffic How to decrypt Diffie-Hellman SSL sessions by using a Web Browser to get the SSL session keys https://supportkb.riverbed.com/support/index?page=content&id=S29218
Views: 11534 RiverbedSupport
The handshake process between client and server has changed dramatically with the new TLS 1.3 protocol. The new process is much more efficient and allows encrypted application data to flow much faster than in previous versions. In this video, John outlines the new TLS 1.3 handshake and talks about all the cool new features it has. https://devcentral.f5.com/articles/lightboard-lessons-the-tls-13-handshake-31386
Views: 6103 F5 DevCentral
SSL is implemented using SSL protocol stack 1.SSL Record Protocol 2.Handshake Protocol 3.Change Cipher Spec Protocol 4.Alert Protocol
Views: 62101 Sundeep Saradhi Kanthety
1. The SSL or TLS client sends a client hello message that lists cryptographic information such as the SSL or TLS version and, in the client's order of preference, the CipherSuites supported by the client. The message also contains a random byte string that is used in subsequent computations. The protocol allows for the client hello to include the data compression methods supported by the client. 2. The SSL or TLS server responds with a server hello message that contains the CipherSuite chosen by the server from the list provided by the client, the session ID, and another random byte string. The server also sends its digital certificate. If the server requires a digital certificate for client authentication, the server sends a client certificate request that includes a list of the types of certificates supported and the Distinguished Names of acceptable Certification Authorities (CAs). 3. The SSL or TLS client verifies the server's digital certificate. 4. The SSL or TLS client sends the random byte string that enables both the client and the server to compute the secret key to be used for encrypting subsequent message data. The random byte string itself is encrypted with the server's public key. 5. If the SSL or TLS server sent a client certificate request, the client sends a random byte string encrypted with the client's private key, together with the client's digital certificate, or a no digital certificate alert. This alert is only a warning, but with some implementations the handshake fails if client authentication is mandatory. 6. The SSL or TLS server verifies the client's certificate. For more information, see How SSL and TLS provide identification, authentication, confidentiality, and integrity. 7. The SSL or TLS client sends the server a finished message, which is encrypted with the secret key, indicating that the client part of the handshake is complete. 8. The SSL or TLS server sends the client a finished message, which is encrypted with the secret key, indicating that the server part of the handshake is complete. 9. For the duration of the SSL or TLS session, the server and client can now exchange messages that are symmetrically encrypted with the shared secret key. Blog 1: https://blog.mindorks.com/how-to-convert-your-laptop-desktop-into-a-server-and-host-internet-accessible-website-on-it-part-1-545940164ab9 Blog 2: https://blog.mindorks.com/how-to-convert-your-laptop-desktop-into-a-server-and-host-internet-accessible-website-on-it-part-2-cdb4b3633fa9 Please Subscribe! And like. And comment. That's what keeps us going. Want more tutorials? Visit us: Website: https://afteracademy.com Medium: https://medium.com/afteracademy Connect with us here: Twitter: https://twitter.com/after_academy Facebook: https://facebook.com/afteracademy
Views: 79 AfterAcademy
Modern day encryption is performed in two different ways. Check out http://YouTube.com/ITFreeTraining or http://itfreetraining.com for more of our always free training videos. Using the same key or using a pair of keys called the public and private keys. This video looks at how these systems work and how they can be used together to perform encryption. Download the PDF handout http://itfreetraining.com/Handouts/Ce... Encryption Types Encryption is the process of scrambling data so it cannot be read without a decryption key. Encryption prevents data being read by a 3rd party if it is intercepted by a 3rd party. The two encryption methods that are used today are symmetric and public key encryption. Symmetric Key Symmetric key encryption uses the same key to encrypt data as decrypt data. This is generally quite fast when compared with public key encryption. In order to protect the data, the key needs to be secured. If a 3rd party was able to gain access to the key, they could decrypt any data that was encrypt with that data. For this reason, a secure channel is required to transfer the key if you need to transfer data between two points. For example, if you encrypted data on a CD and mail it to another party, the key must also be transferred to the second party so that they can decrypt the data. This is often done using e-mail or the telephone. In a lot of cases, sending the data using one method and the key using another method is enough to protect the data as an attacker would need to get both in order to decrypt the data. Public Key Encryption This method of encryption uses two keys. One key is used to encrypt data and the other key is used to decrypt data. The advantage of this is that the public key can be downloaded by anyone. Anyone with the public key can encrypt data that can only be decrypted using a private key. This means the public key does not need to be secured. The private key does need to be keep in a safe place. The advantage of using such a system is the private key is not required by the other party to perform encryption. Since the private key does not need to be transferred to the second party there is no risk of the private key being intercepted by a 3rd party. Public Key encryption is slower when compared with symmetric key so it is not always suitable for every application. The math used is complex but to put it simply it uses the modulus or remainder operator. For example, if you wanted to solve X mod 5 = 2, the possible solutions would be 2, 7, 12 and so on. The private key provides additional information which allows the problem to be solved easily. The math is more complex and uses much larger numbers than this but basically public and private key encryption rely on the modulus operator to work. Combing The Two There are two reasons you want to combine the two. The first is that often communication will be broken into two steps. Key exchange and data exchange. For key exchange, to protect the key used in data exchange it is often encrypted using public key encryption. Although slower than symmetric key encryption, this method ensures the key cannot accessed by a 3rd party while being transferred. Since the key has been transferred using a secure channel, a symmetric key can be used for data exchange. In some cases, data exchange may be done using public key encryption. If this is the case, often the data exchange will be done using a small key size to reduce the processing time. The second reason that both may be used is when a symmetric key is used and the key needs to be provided to multiple users. For example, if you are using encryption file system (EFS) this allows multiple users to access the same file, which includes recovery users. In order to make this possible, multiple copies of the same key are stored in the file and protected from being read by encrypting it with the public key of each user that requires access. References "Public-key cryptography" http://en.wikipedia.org/wiki/Public-k... "Encryption" http://en.wikipedia.org/wiki/Encryption
Views: 496236 itfreetraining
PKIX path building failed youtube,SunCertPathBuilderException,javax.net.ssl.SSLHandshakeException Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target importing a certificate to the keystore
Views: 16416 Zariga Tongy
This video corresponds to the technote found on: http://www.entrust.net/knowledge-base/technote.cfm?tn=8893 This video will guide you through the process of installing an SSL/TLS certificate on F5 Big IP. For further technical support or assistance please contact Entrust Certificate Services support. You can find our contact information here: https://www.entrust.net/customer_support/contact.cfm Hours of Operation: Sunday 8:00 PM ET to Friday 8:00 PM ET North America (toll free): 1-866-267-9297 Outside North America: 1-613-270-2680
Views: 10981 Entrust Datacard
What is SSH key pair? Why we need SSH key? How SSH key works? Authentication via ssh key pair. Generate and Use SSH key : https://goo.gl/hK9h54 Become My Patron here https://goo.gl/NcvDQh You can donate any amount via Paypal follow this link https://goo.gl/JhWsKC ============================================== Deploy Laravel on Digital Ocean Full series: 1. Log Into Server via SSH ? https://youtu.be/hlZk0BkX6XY 2. High Server Security https://youtu.be/T7WinEDS7e4 3. Install LEMP stack on Ubuntu server https://youtu.be/QY_eT7wBqwA 4. Install Laravel via Github on server https://youtu.be/oRGoN-2G-7w ============================================== Join Our Slack Community - https://goo.gl/pqCjZH --You May Also Like -- Real Time Chat Series - https://goo.gl/ri42FD Git ans Github series - https://goo.gl/BXyPxf Blog with Admin panel Series - https://goo.gl/S5JGyt Laravel Authentication Series: Multi Auth - https://goo.gl/TyCLlX Vue Beginner To advanced Series - https://goo.gl/1bjdGg Sublime Text Best Package Series - https://goo.gl/6phTPP Laravel Ajax Todo Project - https://goo.gl/p2xTPW Laravel 5.4 Full Beginner Playlist - https://goo.gl/zpKzhM Laravel 5.3 Hindi Beginner Tutorials - https://goo.gl/Kb3ikd Full Playlist for the "Laravel 5.3 Hindi Beginner Tutorials" Series: https://www.youtube.com/playlist?list=PLe30vg_FG4OS38IkXcimlq7bI1mzD8wB- ==================FOLLOW ME ================== Subscribe for New Releases! Twitter - https://twitter.com/bitfumes Facebook - https://www.facebook.com/Bitfumes/ Instagram - https://www.instagram.com/bitfumes/ (ask me questions!) --- QUESTIONS? --- Leave a comment below and I or someone else can help you. For quick questions you may also want to ask me on Twitter, I respond almost immediately. Email me [email protected] Thanks for all your support! LARAVEL 5.4 Tutorial | Cara Instal LARAVEL 5,4 dari awal Part 1 | Bitfumes Laravel 5.4 Tutorial | Come installare laravel 5,4 da zero Parte 1 | Bitfumes -~-~~-~~~-~~-~- Please watch: "Laravel 5.4 Tutorial | Email From Server (Godaddy) #3 | Part 26 | Bitfumes" https://www.youtube.com/watch?v=QQqJUypWctU -~-~~-~~~-~~-~- que es api ما هو أبي o que é api
Views: 45400 Bitfumes Webnologies
In this video tutorial we will learn how to install and configure ssl certificate in exchange 2016. For this demonstration i will be using my local enterprise root certificate authority to get ssl certificate with subject alternative name for our Exchange 2016. 1) Create a certificate request 2) Get certificate from Certificate Authority 3) Import certificate on Exchange 2016 4) Assign certificate to exchange services
Views: 22034 MSFT WebCast
When your having multiple Windows servers which should use same SSL certificate, such as load balancing environment, switching hosting companies, wildcard or UC SSL certificates, you can export the certificate to .pfx file and import it into a new server.
Views: 73726 Sachin Samy
In this tutorial you will learn: How to Generate or Create (CSR) Certificate Signing Request in IIS 8.5 on windows server 2012 R2. This video contains: 1) How to create / request domain certificate in IIS 8.5 2) How to Generate or Create (CSR) Certificate Signing Request in IIS 8.5 3) How to Install / Assign certificate to IIS 8.5 4) How to test SSL certificate on IIS 8.5
Views: 83446 MSFT WebCast
This is a segment of this full video: https://www.youtube.com/watch?v=YEBfamv-_do Diffie-Hellman key exchange was one of the earliest practical implementations of key exchange within the field of cryptography. It relies on the discrete logarithm problem. This test clip will be part of the final chapter of Gambling with Secrets!
Views: 452006 Art of the Problem
This video details the process of installing an SSL Certificate in IIS 7 on Windows Server 2008.
Views: 74230 SSL Corp
This video will guide you through the process of installing a Secure Email (S/MIME) certificate on Outlook 2016. This video relates to the technote found on: http://www.entrust.net/knowledge-base/technote.cfm?tn=70593 Contents of the video: 0:20 – Introduction 0:26 – Part 1 of 4: Installing the S/MIME certificate in the personal certificate store 1:42 – Part 2 of 4: Updating security setting to link S/MIME to Outlook profile 2:59 – Part 3 of 4: Signing and Encrypting messages 3:43 – Part 4 of 4: Storing a contact’s SMIME certificate (S/MIME Exchange) For further technical support or assistance please contact Entrust Certificate Services support. You can find our contact information here: https://www.entrust.net/customer_support/contact.cfm Hours of Operation: Sunday 8:00 PM ET to Friday 8:00 PM ET North America (toll free): 1-866-267-9297 Outside North America: 1-613-270-2680
Views: 24920 Entrust Datacard
VMware strongly recommends that you configure SSL certificates for authentication of View Connection Server instances, security servers, and View Composer service instances. A default SSL server certificate is generated when you install View Connection Server instances, security servers, or View Composer instances. You can use the default certificate for testing purposes. Replace the default certificate as soon as possible. The default certificate is not signed by a Certificate Authority (CA). Use of certificates that are not signed by a CA can allow untrusted parties to intercept traffic by masquerading as your server.
Views: 7505 Eric Sloof
Website + download source code @ http://www.zaneacademy.com | typo in server display corrected here https://youtu.be/6C5sq5TaVMs?t=90 00:08 demo prebuilt version of the application 04:20 what discrete logarithm problem(s) does Eve need to solve [typo correction in server console] s(congruent)B^a mod p [typo correction in server console] s(congruent)A^b mod p 05:00 quick intro to Diffie Hellman Key Exchange (DHKE) 06:00 what is a group 7:30 what is a cyclic group 7:50 what is a group generator 09:08 DHKE proof 10:12 what is the Discrete Logarithm Problem 10:51 what is the Diffie Hellman Problem 11:55 what is the generalized discrete logarithm problem 12:55 why 1 and p-1 are not included when picking the secret keys for both parties 14:30 start coding the application 17:35 coding the server side 22:25 coding the client side 26:54 initializing the domain params p and alpha 27:58 calculating the public key 28:45 calculating the common key 29:56 test running the application [typo correction in server console] s (congruent) B^a mod p [typo correction in server console] s (congruent) A^b mod p
Views: 1906 zaneacademy
In this video, you will learn how to setup a user with Public-Key-Only Authentication using an SSH Key pair. This includes creation of a test account and verification of connection to EFT using CuteFTP as a client. We will also create an SSH key pair (public/private) with the use of the client; your user's ability to do so with their client will vary depending on the client used. Afterwards we will review how to import the needed public key in EFT and how to assign it to the user in question. Finally, we will use a method for confirming the connection is occurring via the SSH Public Key as expected. Still have questions? Visit our online help site for more information: http://help.globalscape.com/help/eft7-3/mergedprojects/eft/creating_an_ssh_key_pair.htm Choose EFT Enterprise for your secure file transfers, visit our website for more information: https://www.globalscape.com/managed-file-transfer
If you use kcmpcare email on your iPhone or iPad, follow the instructions in this video to make sure it works properly.
Views: 2142 Patrick Cuezze
Author, teacher, and talk show host Robert McMillen shows you how to create Group Policy settings to trust a self signed certificate in Windows Server 2016. By binding the certificate in IIS you can use a self signed certificate and have them trusted by domain PCs to be used internally and work without errors.
Views: 2951 Robert McMillen
In order to export the private key for a certificate, you will need to base the certificate on a template that has that option enabled. While this task can be easily accomplished using PowerShell, I’ll show you a step by step video using the GUI. This video contains: 1) How to Create Certificate Template 2) How to Request certificate using Certificate Authority Web Enrollment.
Views: 27159 MSFT WebCast
This video demonstrates how to fix the SSH issue a lot of people run into these days when they're attempting to connect to a machine running a version of openssh-server which doesn't have a KexAlgorithm/Cipher/MAC that matches the clients. This explanation works for Linux and Mac OSX, even High Sierra
Views: 148 Rob P
Check out our blog for the full article: https://goo.gl/LBHWou This video describes how to download and install a Digital Certificate (.pfx or PKCS#12 File) onto your Android Device. ********************************************************************* GlobalSign is a WebTrust-certified certificate authority (CA) and provider of Identity Services. Founded in Belgium in 1996, the company offers a diverse range of Identity service solutions. GlobalSign provides PKI and Identity and Access Management services to provide enterprises with a platform to manage internal and external identities for the Internet of Everything. The services allow organizations to deploy secure e-services, manage employee and extended enterprise identities and automate PKI deployments for users, mobile, and machines. #SSL #PKI #IoT ********************************************************************* ✔ We've been a Certificate Authority for over 20 years! 🌎 Visit the link to find out more about GlobalSign: ➪ https://www.globalsign.com/ 🔒 Click below to explore our SSL options: ➪ https://www.globalsign.com/en/ssl/ ☁ Scalable options made available for business and enterprise levels, visit the link below to find out more details: ➪ https://www.globalsign.com/en/enterprise/ ********************************************************************* 👉 Follow our Social Networks and stay connected: ● Facebook - https://www.facebook.com/GlobalSignSSL/ ● Twitter - https://www.twitter.com/globalsign ● Google Plus - https://www.google.com/+globalsign ● LinkedIn - https://www.linkedin.com/company/928855/ *********************************************************************
Views: 108045 GlobalSign
Views: 405 A Lesson Everyday.
At 4:30: A mistake: step 3: When the file server gets the token, it "decrypts" (not "encrypts") the token with the secret key shared with TGS. In Greek mythology, Kerberos is a dog with three heads. But today I will not talk about the dog. Kerberos is an authentication protocol for client/server applications. I will demonstrate with an example how Kerberos works. Keep in mind, Kerberos implements private key encryption. Playlist: Basic Cryptography https://www.youtube.com/watch?v=vk3py9M2IfE&list=PLSNNzog5eyduN6o4e6AKFHekbH5-37BdV Advanced Cryptography: https://www.youtube.com/watch?v=TmA2QWSLSPg&list=PLSNNzog5eydtwsdT__t5WtRgvpfMzpTc7 Please leave comments, questions and Please subscribe to my channel Many thanks, Sunny Classroom
Views: 97327 Sunny Classroom
I adjust the Apache 2 VC 11 configuration file to enable SSL and create a private key and public self-signed certificate for use on a local development environment. Do not use self-signed certificates in a production environment as public certificates need to be signed by a certificate authority (CA). Sources: https://www.openssl.org/docs/HOWTO/keys.txt (Step 2) https://www.openssl.org/docs/HOWTO/certificates.txt (Step 4)
Views: 18632 ProgramOften
Learn how to use the New Exchange Certificate Wizard to request a certificate for your external Exchange 2010 users. http://www.brickhouselabs.com
Views: 62147 brickhouselabs
In this tutorial you will learn: How to create and configure self signed ssl certificate for IIS 8 A self-signed SSL certificate is an identity certificate signed by its own creator. Download Link for Demo Website: http://tech.petercrys.com/p/demotestsite.html Also See Watch Videos:- How to install and configure dns in windows server 2012 http://youtu.be/iJALObKbSsQ How to install and configure asp.net website on IIS 8 in Windows Server 2012 http://www.youtube.com/watch?v=eU-VVggY_Vs
Views: 125484 Sachin Samy
What is TRANSPORT LAYER SECURITY? What does TRANSPORT LAYER SECURITY mean? TRANSPORT LAYER SECURITY meaning - TRANSPORT LAYER SECURITY definition - TRANSPORT LAYER SECURITY explanation. Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. SUBSCRIBE to our Google Earth flights channel - https://www.youtube.com/channel/UC6UuCPh7GrXznZi0Hz2YQnQ Transport Layer Security (TLS) and its predecessor, Secure Sockets Layer (SSL), both frequently referred to as "SSL", are cryptographic protocols that provide communications security over a computer network. Several versions of the protocols find widespread use in applications such as web browsing, email, Internet faxing, instant messaging, and voice-over-IP (VoIP). Websites use TLS to secure all communications between their servers and web browsers. The Transport Layer Security protocol aims primarily to provide privacy and data integrity between two communicating computer applications.:3 When secured by TLS, connections between a client (e.g., a web browser) and a server (e.g., wikipedia.org) have one or more of the following properties: The connection is private (or secure) because symmetric cryptography is used to encrypt the data transmitted. The keys for this symmetric encryption are generated uniquely for each connection and are based on a shared secret negotiated at the start of the session (see TLS handshake protocol). The server and client negotiate the details of which encryption algorithm and cryptographic keys to use before the first byte of data is transmitted (see Algorithm below). The negotiation of a shared secret is both secure (the negotiated secret is unavailable to eavesdroppers and cannot be obtained, even by an attacker who places themselves in the middle of the connection) and reliable (no attacker can modify the communications during the negotiation without being detected). The identity of the communicating parties can be authenticated using public-key cryptography. This authentication can be made optional, but is generally required for at least one of the parties (typically the server). The connection ensures integrity because each message transmitted includes a message integrity check using a message authentication code to prevent undetected loss or alteration of the data during transmission.:3 In addition to the properties above, careful configuration of TLS can provide additional privacy-related properties such as forward secrecy, ensuring that any future disclosure of encryption keys cannot be used to decrypt any TLS communications recorded in the past. TLS supports many different methods for exchanging keys, encrypting data, and authenticating message integrity (see Algorithm below). As a result, secure configuration of TLS involves many configurable parameters, and not all choices provide all of the privacy-related properties described in the list above (see authentication and key exchange table, cipher security table, and data integrity table). Attempts have been made to subvert aspects of the communications security that TLS seeks to provide and the protocol has been revised several times to address these security threats (see Security). Developers of web browsers have also revised their products to defend against potential security weaknesses after these were discovered (see TLS/SSL support history of web browsers.) The TLS protocol comprises two layers: the TLS record protocol and the TLS handshake protocol. TLS is a proposed Internet Engineering Task Force (IETF) standard, first defined in 1999 and updated in RFC 5246 (August 2008) and RFC 6176 (March 2011). It builds on the earlier SSL specifications (1994, 1995, 1996) developed by Netscape Communications for adding the HTTPS protocol to their Navigator web browser.
Views: 4182 The Audiopedia
WinSCP Download - https://winscp.net/eng/download.php Demo how to import an OpenSSH formatted Private and Public Key Pair into WinSCP for use with SSH and SFTP
Views: 11847 CodeCowboyOrg
Kerberos in Hindi – Network Authentication Protocol, KDC, AS, TGS Like FB Page - https://www.facebook.com/Easy-Engineering-Classes-346838485669475/ Complete Data Structure Videos - https://www.youtube.com/playlist?list=PLV8vIYTIdSna11Vc54-abg33JtVZiiMfg Complete Java Programming Lectures - https://www.youtube.com/playlist?list=PLV8vIYTIdSnbL_fSaqiYpPh-KwNCavjIr Previous Years Solved Questions of Java - https://www.youtube.com/playlist?list=PLV8vIYTIdSnajIVnIOOJTNdLT-TqiOjUu Complete DBMS Video Lectures - https://www.youtube.com/playlist?list=PLV8vIYTIdSnYZjtUDQ5-9siMc2d8YeoB4 Previous Year Solved DBMS Questions - https://www.youtube.com/playlist?list=PLV8vIYTIdSnaPiMXU2bmuo3SWjNUykbg6 SQL Programming Tutorials - https://www.youtube.com/playlist?list=PLV8vIYTIdSnb7av5opUF2p3Xv9CLwOfbq PL-SQL Programming Tutorials - https://www.youtube.com/playlist?list=PLV8vIYTIdSnadFpRMvtA260-3-jkIDFaG Control System Complete Lectures - https://www.youtube.com/playlist?list=PLV8vIYTIdSnbvRNepz74GGafF-777qYw4
Views: 92385 Easy Engineering Classes
This video, talks about basic concepts related with TLS/SSL protocol and how its handshake process make effective use of PKI for key distribution. ************* For Complete course on Information Security Concepts: http://www.training.hack2secure.com/courses/infsec-concepts/ **************
Author, teacher, and talk show host Robert McMillen shows you how to create a Self Signed Certificate and Bind in IIS in Windows Server 2016.
Views: 32967 Robert McMillen
New UI is here https://www.youtube.com/watch?v=mFuajrK46iI&feature=youtu.be
Views: 19099 Kirill Ivanov
Certificates are used to prove identity and used for creating secure communication. Check out http://itfreetraining.com for more of our always free training videos. This video looks at how a certificate works, what is a certificate and how they are used for identification and secure communication. Download the PDF handout http://itfreetraining.com/Handouts/Certificates/WhatAreCertificates.pdf What is a certificate? A certificate is an electronic document that contains data fields. When compared to a traditional paper certificate there are some similarities between an electronic certificate and a physical certificate. Digital certificates like a physical certificate are issued by an authority. For example, a university may issue a certificate to a student to show that they have completed the necessary work in order to graduate. The next question is, would you trust a physically certificate? Digital certificates work the same way. They are issued from an authority and the question becomes would you trust the authority that issued the certificate? Electronic certificates also contain other fields like who or what the certificate was issued to, how long it is valid, the public key and the digital signature. If a digital certificate is presented to a user or computer, the user or computer is able to check the certificate to ensure the person using it should be using it. Also the certificate contains a digital signature which allows the certificate to be checked to make sure it has not been modified. Digital Signature A digital signature provides a method for a certificate to be checked to ensure it has not been modified. In order to do this, a hash value is created for the certificate. To generate a hash value the certificate is put through a function to create a single value. Hash functions are designed so different certificates will not produce the same value, however the hash value cannot be used to generate the original certificate. The same principal applies to a person's fingerprints. They can be used to identify a person, however using a finger print you could not work out the features of a person like what color hair they have. When a certificate is created, the hash value for that certificate is also created. Using a function involving the private key, a digital signature is created and added to the certificate. Digital Signature Example When a certificate is used, in order to check the certificate has not been changed, the following is done: The computer generates the hash value for the certificate. Next, the digital signature is put through a function using the public key which should result in the same hash value. If both values match, the certificate has not been modified. This prevents a 3rd party taking a certificate, changing the values in the certificate and using the certificate. Trust Model Certificates work off a trust model. An example of a trust model in computers is that a computer may have a sticker on it indicating which operating systems it will run. The consumer, seeing this sticker, must trust that the manufacture would not put this sticker on the laptop unless it will run that operating system. The customer must also trust the creator of that operating system would not allow a computer manufacturer to put a sticker on a computer that would not run that operating system. Certificate Trust Model Certificates are generally deployed in a hierarchy. At the top is the root certificate authority. This can be an internal Certificate Authority or an external authority like VeriSign. When an authority like VeriSign issues a certificate, they will perform a number of checks on the individual purchasing the certificate to ensure that they are a valid business. When a certificate is used it can be checked to see which authority issued that certificate. In order for the certificate to be used, the computer must trust the authority that it was issued from. Authorities like VeriSign are trusted by default on most operating systems. Certificate Error If a certificate is presented to the computer and it is not trusted, the computer will generate an error asking if the users want to trust the certificate. It is up to the user to decide if they believe the certificate is valid. Certificate Hierarchy Certificates use a hierarchy. At the top is the root CA, below these are subordinate CA's. Any level can issue certificates to subordinate CA's or direct to users, computers or devices. If the user, computer or device trusts the root CA, then any certificate that is issued by any CA in the hierarchy will automatically be trusted and thus used by the client. References "MCTS 70-640 Configuring Windows Server 2008 Active Directory Second edition" pg 771-775 "Public key certificate" http://en.wikipedia.org/wiki/Public_key_certificate
Views: 528666 itfreetraining
WinSCP Download - https://winscp.net/eng/download.php Demo how to import an OpenSSH formatted Private and Public Key Pair into WinSCP for use with SSH and SFTP
Views: 57476 CodeCowboyOrg
1. How SSL/TLS Handshake Works? Understand what SSL/TLS handshake is and how it works.. On an SSL encrypted website, the data transmission starts off with SSL/#TLS handshake process. 2. Why Do We Use SSL/TLS SSL Encrypts Sensitive Information SSL Provides Authentication SSL Provides Trust 3. How #SSL/TLS Stack Looks Like : 4. How SSL/TLS Handshake Works Watch Video : https://youtu.be/d39Q6JGw4So Follow on twitter: https://goo.gl/D9o73a Like my FB page! https://goo.gl/RUFhu3 Follow on Google Plus: https://goo.gl/RdxfEi Subscribe on Youtube https://goo.gl/CdBSC0 Website: https://www.ssdntech.com/
Views: 506 SSDN Technologies Pvt. Ltd.