Find a 77-bit one-time pad that generates the text ''Donald Duck'' from the cipher text of Fig. 8-4.
Answer to relevant QuestionsQuantum cryptography requires having a photon gun that can, on demand, fire a single photon carrying 1 bit. In this problem, calculate how many photons a bit carries on a 100-Gbps fiber link. Assume that the length of a ...In the text we computed that a cipher-breaking machine with a billion processors that could analyze a key in 1 picosecond would take only 1010 years to break the 128-bit version of AES. However, current machines might have ...Consider the use of counter mode, as shown in Fig. 8-15, but with IV = 0. Does the use of 0 threaten the security of the cipher in general?Suppose that a system uses PKI based on a tree-structured hierarchy of CAs. Alice wants to communicate with Bob, and receives a certificate from Bob signed by a CA X after establishing a communication channel with Bob. ...In the protocol of Fig. 8-39, why is A sent in plaintext along with the encrypted session key? In the protocol of Fig. 8-39, we pointed out that starting each plaintext message with 32 zero bits is a security risk. Suppose ...
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