Web中有两种算法。
在这两种算法中,第一部分是相同的…
1. Pad the last partial plaintext block
with 0.
2. Encrypt the whole padded plaintext
using the standard CBC mode.
3. Swap the last two ciphertext blocks.
4. Truncate the ciphertext to the length of the original plaintext
但是对于解密,有两种方法…我真不知道哪一个是正确的
这个是从
here
1. If the ciphertext length is not a multiple of the block size, say it is n bits short, then pad it with the last n bits of the block cipher decryption of the last full ciphertext block.
2. Swap the last two ciphertext blocks.
3. Decrypt the ciphertext using the Cipher Block Chaining mode.
4. Truncate the plaintext to the length of the original ciphertext.
这是正确的解密过程吗?这会逆转在第一个加密部分发生的情况吗?
我很困惑
Wikipedia Article
具有相同的加密过程,但
decryption is different
密码专家能给我一些启示吗?提前很多:)