Select the two correctstatements from the list below that describe DES and 3DES: ()

A .  3DES is muchmore secure than DES. B .  Both DES and 3DES are stream ciphers. C .  DES uses 64 bitkeys, although the effective key lengthis only 56bits. D .  The decryption operation for both DES and 3DES is the same as the encryption operation. E .  DES can only be used for encryption, whereas 3DES can also be used for authentication.

时间:2022-10-18 23:43:58 所属题库:CCIE(350-018)题库

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