1 Assume Secure Macs Exist Prove That There Exists A Mac That Is Secure By Definitio 1893287
1. Assume secure MACs exist. Prove that there exists a MAC that is secure (by Definition 4.2) but is not strongly secure (by Definition 4.3). 2. Consider the following MAC for messages of length ℓ(n) = 2n − 2 using a pseudorandom function F: On input a message m0||m1 (with |m0| = |m1| = n […]


