Now consider the opposite problem: using an encryption algorithm to construct a oneway hash function. Consider using RSA with a known key. Then process a message consisting of a sequence of blocks as follows: Encrypt the first block, XOR the result with the second block and encrypt again, etc. Show that this scheme is not secure by solving the following problem. Given a two-block message B1, B2, and its hash RSAH(B1, B2) = RSA(RSA (B1) +B2) Given an arbitrary block C1, choose C2 so that RSAH(C1, C2) = RSAH(B1, B2). Thus, the hash function does not satisfy weak collision resistance.

Q: A good cryptographic hashing algorithm should produce random outputs; that is, the probability of…

A:

Q: se Alice computes the Secret suffix MAC (page 322: secret suffix MAC(x) = h(x || key)) for the…

A: There is no encryption performed by Alice. Therefore the information sent by alice is FMC

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A: Below i have answered:

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A:

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A: There is no encryption performed by Alice. Therefore the information sent by alice is FMC

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A: the answer is

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A:

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Q: How

A: She compares h(M) to DSeB mod N.

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A: Introduction An algorithm is a system utilized for tackling an issue or playing out a calculation.

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A: ANSWER:-

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A:

Q: 2. Consider the above Feistel cipher with r = 2 rounds. Imagine a key scheduling algorithm that…

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Hash Table

A hash table also called a hash map, is a data structure that maps key-value pairs. The hash table can be used in complex systems to provide fast access and compact storage. A hash table is a structure that stores data in an abstract data type kind of associative array. It keeps data in an array format, with a distinct index value for every data value. If the index of the required data is known, then the data can be accessed very easily.