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2

Plain text of data, including server's public key Yes, and many other public information, including something identifying the holder of the public key (perhaps in the Common Name field). Signature of hashed version of plain text Yes, except that the correct semantic is: Signature of the plain text. Building and verifying the signature includes ...


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You'd have to move to 9DES rather than 6DES as undoubtedly 6DES would still fall to the meet in the middle attack that can be performed on 2DES, now with the two 3DES block ciphers as parts. That means that (given a large amount of memory), the attack only adds a single bit of security, 113 bits. Even then, just like 3DES has only 112 bits security for 3 ...


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For this answer I'll be focussing on solely on RSA (the RSA tag is present, so I'll suppose that this question is just about RSA). It is also the most likely signature scheme that requires padding, I suppose. TL;DR: you don't just need to know the padding scheme in advance, but also the other configuration options to be used, such as data hash method and ...


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