CRYPTON
{{Short description|Block cipher}}
{{About|cryptology|other uses|Crypton (disambiguation){{!}}Krypton (disambiguation)}}
{{third-party |date=April 2024}}
{{Infobox block cipher
| name = CRYPTON
| designers = Chae Hoon Lim
| publish date = 1998
| derived from = Square
| derived to =
| related to =
| key size = 128, 192, or 256 bits
| block size = 128 bits
| structure = Substitution–permutation network
| rounds = 12
| cryptanalysis =
}}
In cryptography, CRYPTON is a symmetric block cipher submitted as a candidate for the Advanced Encryption Standard (AES). It is very efficient in hardware implementations and was designed by Chae Hoon Lim of Future Systems Inc.
The CRYPTON algorithm processes blocks of 128 bits in the form of 4×4 byte arrays. The round transformation consists of four steps: byte-wise substitution, column-wise bit permutation, column-to-row transposition and finally key addition. CRYPTON uses 12 rounds of this encryption process. Due to the algorithm's nature, the decryption process can be made identical to the encryption process using a different key.
See also
External links
- [https://web.archive.org/web/20160303172320/http://dasan.sejong.ac.kr/~chlim/pub/ches99.doc Hardware Design and Performance Estimation of The 128-bit Block Cipher CRYPTON] by Eunjong Hong, Jai-Hoon Chung, Chae Hoon Lim
- [http://www.users.zetnet.co.uk/hopwood/crypto/scan/cs.html#CRYPTON-0.5 SCAN's entry for CRYPTON] version 0.5 as originally submitted as AES candidate to NIST
- [https://web.archive.org/web/20160603143304/http://dasan.sejong.ac.kr/~chlim/pub/cryptonv05.ps CRYPTON: A New 128-bit Block Cipher - Specification and Analysis (Version 0.5)] by Chae Hoon Lim, Hyo Sun Hwang
- [https://web.archive.org/web/20160603062743/http://dasan.sejong.ac.kr/~chlim/pub/cryptonv10.ps CRYPTON: A New 128-bit Block Cipher - Specification and Analysis (Version 1.0)] by Chae Hoon Lim, Hyo Sun Hwang
- [http://csrc.nist.gov/archive/aes/round1/comments/980828-jborst.pdf Weak Keys of CRYPTON] by Johan Borst, 28 Aug 1998. Response to call for comments on AES candidates. Retrieved 2014-01-23.
- [http://cartman-cipher.narod.ru/mirror/crypton-pas.zip CRYPTON 1.0 Delphi implementation]
{{Cryptography navbox | block}}
{{crypto-stub}}