Question: Problem 1.8, 5 points. Find (by using the Internet) blockcipher-based MACS ahat are provably secure (UF-CMA) for variable-length messages assuming the un- derlying block cipher

Problem 1.8, 5 points. Find (by using the Internet) blockcipher-based MACS ahat are provably secure (UF-CMA) for variable-length messages assuming the un- derlying block cipher is a PRF. Provide the constructions names and cite the sources. 3 examples are sufficient

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