Known-plaintext attack

- one of the most popular methods of breaking ciphers, which assumes that the cryptanalyst has bot h szyfrogramami and their explicit lyrics, by which it is possibl e to obtain the encryption key / There are many ways to get the p laintext cryptography: it may be captured or przekupiona person can encrypt a particular plaintext. In the case of public-key algorithms to obtain the plaintext from the ciphertext is not a problem [1]. This attack was used in linear cryptanalysis of DESA. But this is not a practical attack, it requires a large number of explicit known texts - about 243