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單項選擇題

Which algorithm was the first to be found suitable for both digital signing and encryption？（）

A.HMAC
B.RSA
C.MD5
D.SHA-1

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單項選擇題

Which example is of a function intended for cryptographic hashing？（）

A.MD65
B.SHA-135
C.XR12
D.MD5

單項選擇題

Which one of the following items may be added to a password stored in MD5 to make it more secure？（）

A.Ciphertext
B.Salt
C.Cryptotext
D.Rainbow table

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