Method of encryption

Let us call a method of encryption valid if it is possible to recover the originalplaintext from the encrypted word.For example let K = 1010 and consider the following two possible ways toencrypt a plaintext of length 4. Bitwise XOR with K. Then the original plaintext...

Method of encryption

Let us call a method of encryption valid if it is possible to recover the originalplaintext from the encrypted word.For example let K = 1010 and consider the following two possible ways toencrypt a plaintext of length 4. Bitwise XOR with K. Then the original plaintext...