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1. Show that Construction 4.7 for constructing a variable-length MAC from any fixed-length MAC can also be used (with appropriate modifications) to construct a signature scheme for arbitrary-length messages from any signature scheme for messages of fixed length l(n) ≥ n

2. Prove that the existence of a one-time-secure signature scheme for 1-bit messages implies the existence of one-way functions.

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Computer Engineering, Engineering

Category:- Computer Engineering
Reference No.:- M91995024

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