A、Operating Point Analysis B、Transient Analysis C、Fourier Analysis D、DCSweep Analysis
A、A. 3DES is muchmore secure than DES. B、B. Both DES and 3DES are stream ciphers. C、C. DES uses 64 bitkeys, although the effective key lengthis only 56bits. D、D. The decryption operation for both DES and 3DES is the same as the encryption operation. E、E. DES can only be used for encryption, whereas 3DES can also be used for authentication.
A、the main portion identifying the consignment B、a three-digit prefix identifying the carrier C、the main portion identifying the carrier D、the last check digit for accounting and security purposes
A、DES是一个分组加密算法,它以64位为分组对数据加密 B、IDEA是一种使用一个密钥对64位数据块进行加密的加密算法 C、DES和IDEA均为对称密钥加密算法 D、DES和IDEA均使用128位(16字节)密钥进行操作