Compute an rsa based digital signature on a long message

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Doing a digital signature with RSA alone on a long message would be too slow (presumably using cipherblock chaining).

Suppose we could do division quickly. Would it be reasonable to compute an RSA based digital signature on a long message by first finding what the message equals (mod n) and then signing the result of the division mod n? Explain.

Reference no: EM131853813

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