Cryptanalysis: XOR of two plaintext files.

I have a file which contains the result of two XORed plaintext files. How do I attack this file in order to decrypt either of the plaintext files? I have searched quite a bit, but could not find any answers. Thanks! **EDIT:** Well, I also have the two ciphertexts which i XORed to get the XOR of the two plaintexts. The reason I ask this question, is because, according to Bruce Schneier, pg. 198, Applied Cryptography, 1996 "...she can XOR them together and get two plaintext messages XORed with each other. This is easy to break, and then she can XOR one of the plaintexts with the ciphertext to get the keystream." (This is in relation to a simple stream cipher) But beyond that he provided no explanation. Which is why I asked here. Forgive my ignorance. Also, the algorithm used is a simple one, and a symmetric key is used whose length is 3. **FURTHER EDIT:** I forgot to add: Im assuming that a simple stream cipher was used for encryption.
If you can accomplish it without knowing anything about either of the two files to start with, I'm sure there's a job waiting for you at the NSA or similar orgs.

以上就是Cryptanalysis: XOR of two plaintext files.的详细内容,更多请关注web前端其它相关文章!

赞(0) 打赏
未经允许不得转载:web前端首页 » JavaScript 答疑

评论 抢沙发

  • 昵称 (必填)
  • 邮箱 (必填)
  • 网址

前端开发相关广告投放 更专业 更精准