June 18, 2019

Key Differences Between SSL and TLS


Key Differences Between SSL and TLS

    1. The TLS protocol does not support Fortezza/DMS cipher suites while SSL supports Fortezza. Also, the TLS standardization process makes it much easier to define new cipher suites.

    2. In SSL to create a master secret, the message digest of the pre-master secret is used. In contrast, TLS uses a pseudorandom function to generate master secret.

    3. The SSL record protocol adds MAC (Message Authentication Code) after compressing each block and encrypts it. As against, TLS record protocol uses HMAC (Hash-based Message Authentication Code).

    4. The “No certificate” alert message is included in SSL. On the other hand, TLS removes alert description (No certificate) and adds a dozen other values.

    5. SSL message authentication unites key information and application data in an ad-hoc manner, created just for the SSL protocol. Whereas, the TLS protocol just relies on a standard message authentication code known as HMAC.

    6. In the TLS certificate verify the message, the MD5 and SHA-1 hashes are computed only over handshake messages. On the contrary, in SSL the hash calculation also include the master secret and pad.

    7. As with the finished message in TLS, created by applying the pseudorandom function to the master key and handshake messages. Whereas in SSL, it’s constructed by applying message digest to the master key and handshake messages.

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