Question: Consider a variation of the MAC algorithm (Figure 8.9) where the sender sends (m, H(m) + s), where H(m) + s is the concatenation of

Consider a variation of the MAC algorithm (Figure 8.9) where the sender sends (m, H(m) + s), where H(m) + s is the concatenation of H(m) and s. Is this variation flawed? Why or why not?

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