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Cipher block chaining (CBC) is a method for encrypting large amounts of data with a block cipher that can only encrypt fixed length plaintexts. When used with an unpredictable initialization vector (IV), it is secure against chosen plaintext attacks (CPA-secure).

1 vote
1 answer
452 views

How HMAC is calculated for TLS AES_128_CBC_SHA

The RFC 5246 defines generic block cipher as follow: struct { opaque IV[SecurityParameters.record_iv_length]; block-ciphered struct { opaque content[TLSCompressed.length]; …
Elena Gurevich's user avatar
1 vote
1 answer
198 views

Cut through mode for TLS AES-CBC / SHA ciphersuite

I am looking at RFC5246 and it seems that AES-CBC/SHA cipher suites cannot be implemented in a cut-through mode. Let's suppose that received record spans two segments. …
Elena Gurevich's user avatar