纯密码 meaning in English

pure cipher

The encryption method is n ' t considered the characteristic of the video signal , regard the image data file as the general binary scale data file to encrypt
一是用纯密码算法加密技术，将图像数据文件当作一般的二进制数据文件进行加密。
The method in question is a ciphertext - only attack . this means that we don ' t need bits of guessed / known plaintext for a successful decryption
解决问题的方法是对纯密码信息进行攻击。这意味着我们不需要猜解或在已知明码文本的某些比特位信息的情况下来对密文进行完美解密。