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Secure Socket Layer Protocol Dr. John P. Abraham Professor, UTRGV.

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Presentation on theme: "Secure Socket Layer Protocol Dr. John P. Abraham Professor, UTRGV."— Presentation transcript:

1 Secure Socket Layer Protocol Dr. John P. Abraham Professor, UTRGV

2 SSL Can secure transmission over TCP Provides privacy (encryption) and authentication (certificates) HTTPS, secure email and secure financial transactions are examples SSL version 3 is obsolete and is being replaced with the TLS (Transport Layer Security)

3 Web based SSL Browsers are enabled with SSL as such no other configuration is necessary at the user site. At the server side a certificate needs to be installed for each application. Certificate authority such as verisign can provide it. An administrator can create a certificate Certificates are issued with an expiration time The server should allow secure connections

4 Connection speed SSL transmissions are slower because of private public key encryptions. Encryption decryption can be hardware based – use ssl accelerators (PCI cards)

5 SSL sublayers Record Layer – formats messages – provides a header and hash ChangeCipherSpec Protocol- signals beginning of secure communication Alert Protocol – transmits any errors that occurred. Handshake protocol – clientHello, serverHello, ServerKeyExchange, ServerHelloDone, ClientKeyExchange, ChangeCipherSpec, Finished, ChangeCipherSpec, Finished.

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