Câu 157: 400-251: CCIE Security Written Exam

Which description of 3DES encryption algorithm is true?

1. A. It does decryption in reverse order with the same set of keys used during encryption. — đáp án hiện tại
2. B. It uses a set of three keys for encryption and a different set of three keys for decryption.
3. C. It is an asymmetric algorithm with a key size of 168 bits.
4. D. It is a block cipher algorithm but weaker than DES due to smaller key size.
5. E. It is a block cipher algorithm with a key size of 56 bits.
6. F. It is a stream cipher algorithm with a key size of 168 bits.