Question

What happens when two plaintexts are encrypted with the same key using a stream cipher? Show the problem that arises using EXOR math.

Answer 1

with same length. | there is tuo message A SB & both message encrypted using Game Key Let assume key is Stream sipher output Cck) n0ith same length. message. Hence encrypred version of messages are ECA) = E CB) A XOT C _Xor C %3D peoprmed on bit by bit XOR where operation bas Inteopret ECA)-& ECA) r like Hence attacker getting message- ECA) ECB) Xor XOR is commutalive & has property (selk Inverse) but O. so ECA) Xo7 ECB) (A Xor C) Xox (B.x0xC) A xor B C xor C - A XorB. attacker attack'crack- evenlk one message is longer than other, _& Hi5 longer message. portion ok n 8impifed Yoood &EC) cut dongesmessage attack Can able to lompate get encaypted messege ECA). then attacker can able A xox B.Which. So. to crack A XOo B can unnng key cipher extraced to onginel message by paper penci) method