Secure socket layer
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This document provides an overview of SSL/TLS (Secure Sockets Layer/Transport Layer Security) and how it works to secure data transmission over the internet. It discusses why SSL is important for encrypting data and verifying identities. It then explains the basic process of how SSL works, including how a client encrypts requests using a server's public key and how the server decrypts with its private key. The document outlines the requirements to implement SSL, including generating a key and obtaining a certificate. It differentiates between self-signed and authorized certificates. Finally, it provides steps to create a certificate using OpenSSL and configure the Apache web server to use SSL.
![This is the process of
how to create a key
and a certificate.
During creation it asks
for “Passphrase”
And info about the
Web site we are
creating this certificate
for.
Provide your FQDN if
your going to create it
for your website , but
here we are working
locally so we provide
localhost for our FQDN
You can ignore the
optional [] options as
we did some by just
hitting ENTER](https://image.slidesharecdn.com/securesocketlayer-121219020532-phpapp02/85/Secure-socket-layer-28-320.jpg)
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Secure socket layer
- 3. SSL / TLS S.Masihullah Hamidullah Ab.Sattar
- 4. Contents Introduction SSL/TLS Why SSL? How does SSL works? Requirements Self signed certificate Authorized certificate How to create certificate Terms to know about Practice
- 5. Introduction What Business Opportunities does internet provides? • Online Commerce . • Online Shopping . • Online Resource Sharing. • Email and Messaging. • Data Transfer. Benefits. • Cost effectiveness of online operations and delivery • Open global markets - gain customers from all over the world. • New and exciting ways of marketing directly to your customers • Offer new data products and services via the Web
- 6. Cont ... Improvement needs concentration and security What is important to be secure? • Important and Secret Data Transfer • Username and Passwords. • Bank Account Numbers . • Credit Cards. Unsecure Data Threats and challenges • Hack • Data stealing • ID misuse
- 7. SSL / TLS SSL ( Secure Socket Layer ) TLS ( Transport layer Security ) It is a protocol used along with http in order to provide • Identity assurance • Encryption When we implement the SSL protocol along with http it turns into https , which Indicates the Secure Socket layer Protocol
- 8. Why SSL ? 1.Encryption: • Process of hiding what is sent from one computer to another. • Encrypting and securing the data that we want to send to a host. 2.Identity assurance • Making sure that the computer we are speaking to is the one we trust. • Assurance for validation of the remote server by issuing a certificate.
- 9. Identity Assurance Request: www.gmail.com Responding https://gmail.com • The server authenticates us and gives us assurance that the server we are trying to connect with is a real server.
- 10. Plain Text Data transfer with No Secure Socket Layer Hello H e l l o Hello
- 11. Encrypted Data transfer With Secure Socket Layer @$%^$&#!? @ $ % # &
- 12. How does SSL Work? Client Request for page Server responds with a Public key for encryption Request http:// www.gmail.com Response https:// www.gmail.com Request GET index.html Client Encrypts Request using Server Public Key Server Decrypts Request using Private Key
- 13. What do we need? • We need a Key • Crete a Certificate using that key We have two types of certificate Self signed Certificate. Authorized certificate.
- 14. Self Signed Certificate A self signed certificate is a certificate that is signed by the person creating it rather than a trusted authority . It has major Disadvantage: A visitor's connection could be hijacked allowing an attacker view all the data sent and the certificate cannot be revoked like a trusted certificate can. We're going to explain when a self signed certificate should and shouldn't be used . We can generate a self signed certificate for common platforms like Microsoft IIS, Apache, and Java Keytool or openssl .
- 15. Self signed Certificate Usage In a local Network. When clients only have to go through a local Intranet to get to the server, there is virtually no chance of a man-in-the-middle attack. A Development Server. There is no need to spend extra cash buying a trusted certificate when you are just developing or testing an application. Personal sites with few visitors. If you have a small personal site that transfers non-critical information, there is very little incentive for someone to attack the connections.
- 16. Authorized Certificate The certificate which is signed by an authorized vendor. SSL Certificate will contain • your domain name. • your company name • your address • your city • your state and your country. It will also contain the expiration date of the Certificate and details of the Certification Authority responsible for the issuance of the Certificate.
- 17. How to create Certificate? We can create our Certificate using Utilities that we have here. OPENSSL It’s a utility used to create a SSL Certificate. It comes with apache binary package . TOOLKIT This is also a utility used to create SSL Certificate It comes with java package inside the /bin Directory
- 18. Terms to know about RSA Algorithm The RSA algorithm is named after Ron Rivest, Adi Shamir and Len Adleman, who invented it in 1977. The basic technique was first discovered in 1973 by Clifford Cocks (part of the British GCHQ) but this was a secret until 1997. The RSA cryptosystem is the most widely-used public key cryptography algorithm in the world. The RSA algorithm can be used for both public key encryption and digital signatures. Its security is based on the difficulty of factoring large integers.
- 19. Terms to know about Des3 Algorithm The Data Encryption Standard (DES) was developed by an IBM team around 1974 and adopted as a national standard in 1977. Triple DES is a minor variation of this standard. It is three times slower than regular DES but can be billions of times more secure if used properly. Triple DES enjoys much wider use than DES because DES is so easy to break with today's rapidly advancing technology.
- 20. Terms to know about The OSI X.509 standard2. X.509 uses a centralized hierarchy with at most a few trusted entities at its core. These trusted entities issue files which are used to distribute public keys and certify that the bearer of the file is who or what he or she claims to be.
- 21. Lets see code in a glance Certificate Signing Request: genrsa -des3 -out server.key 1024 Create Unencrypted Key: rsa -in server.key -out server.pem Generate Unsigned Certificate: req -new -key server.key -out server.csr 30 day certificate: x509 -req -days 30 -in server.csr -signkey server.key -out server.crt
- 22. Practice
- 23. Apache Installation You can install the setup file of apache server or the Binary File as we are using it in here. Copy the Binary File in to a drive (C:) . Follow the path using the command line “C:apache2bin” Use this command to install apache “httpd –k install” Type localhost in your browser to see if your apache server works.
- 24. Openssl environment To use the openssl utility in order to create certificate , we can copy the path and past it to the windows environment to use it in any where with out every time typing the path to its location . The Openssl utility exists in your “c:apache2bin” directory. Copy the above path and go to the windows environment shown below My Computer Properties > Advanced System Settings > Environment Variable In the Environment Variable choose new path ,give it the name path in variable path and past the path in to the variable value .
- 26. Running Openssl Utility Now that you introduce the Openssl Utility to the windows environment you Can run it using your CMD in any where you want to make your certificate .
- 27. Creating certificate Use the following commands to create your certificate using openssl and provide information during certificate creation as it asks for it. To create Certificate Signing Request: genrsa -des3 -out server.key 1024 To Create Unencrypted Key: rsa -in server.key -out server.pem It gives an error when typing this code . We have to read the error and solve it It says to copy the openssl.conf file to a directory in your (C:) . Follow the exact name for the directory as it says in the error. To Generate Unsigned Certificate: req -new -key server.key -out server.csr To create or sign a 30 day certificate: x509 -req -days 30 -in server.csr -signkey server.key -out server.crt
- 28. This is the process of how to create a key and a certificate. During creation it asks for “Passphrase” And info about the Web site we are creating this certificate for. Provide your FQDN if your going to create it for your website , but here we are working locally so we provide localhost for our FQDN You can ignore the optional [] options as we did some by just hitting ENTER
- 29. Changing Apache Configuration Files We have to bring changes in the following configuration files of apache server. To enable the below modules in httpd.conf file see “C:apacheconf” and enable. #Loadmodule ssl_module modules/mod_ssl.so #LoadModule socache_shmcb_module #modules/mod_socache_shmcb.so #Include conf/extra/httpd-default.conf #Include conf/extra/httpd-ssl.con Specify the certificate and key path in the httpd-ssl in C:apache2confextrsas SSLCertificateFile "c:/Apache24/conf/localhost.crt" SSLCertificateKeyFile "c:/Apache24/conf/localhost.pem“ RESTART YOUR APACHE SERVER TO TO GET YOUR CONFIGURATION DONE !
- 30. Now you are ready to use the https protocol or Secure Socket Layer
- 31. Questions