What is meet-in-the-middle attack
Explain what is meet-in-the-middle attack?
Expert
Meet-in-the-middle attack was first explained in [DIFF77]. It is based upon the observation which says, if we have C=Ek2 [Ek1 [P]]
Then
X=Ek1 [P] =Dk2[C]
Provided a known pair, (P, C), attack proceeds as follows. First, encrypt P for all the 256 possible values of K1. Store these results within a table and then sort table through the values of X. Next, decrypt the C using all the 256 possible values of K2. Since every decryption is generated, check result against the table for the match. If a match happens, then test the two resulting keys against the new known plaintext-cipher text pair. If two keys generate the correct cipher text, accept them as correct keys.
State difference between the AES and Rijndael?
Specify some of the difference between master key and session key?
Explain the final set of criteria which is used by the NIST in order to determine the candidate AES ciphers?
Explain what is meant by the term message authentication? Describe the classes of message authentication function.
What is meant by the term nonce?
Specify the ways through which the secret keys may be distributed to the two communicating parties.
A) Provide a specific illustration of how inference control might be implemented in the database.B) For a public-key encryption system (like PGP), list some areas for and against utilizing the similar key pair for both encryption and signature.
Specify the four categories of security threats?
State the difference between equivalent inverse cipher and AES decryption algorithm?
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