Abstract
New communication environments such as USN, WiBro and RFID have been realized nowadays. Thus, in order to ensure security and privacy protection, various light-weight block ciphers, e.g., mCrypton, HIGHT, SEA and PRESENT, have been proposed. The block cipher mCrypton, which is a light-weight version of Crypton, is a 64-bit block cipher with three key size options (64 bits, 96 bits, 128 bits). In this paper we show that 8-round mCrypton with 128-bit key is vulnerable to related-key rectangle attack. It is the first known cryptanalytic result on mCrypton. We first describe how to construct two related-key truncated differentials on which 7-round related-key rectangle distinguisher is based and then exploit it to attack 8-round mCrypton. This attack requires 2<SUP>45.5</SUP> dada and 2<SUP>45.5</SUP> time complexities which is faster than exhaustive key search.
| Translated title of the contribution | Security Analysis of Light-weight Block Cipher mCrypton Suitable for Ubiquitous Computing Environment |
|---|---|
| Original language | Korean |
| Pages (from-to) | 644-652 |
| Number of pages | 9 |
| Journal | 멀티미디어학회논문지 |
| Volume | 12 |
| Issue number | 5 |
| State | Published - 2009 |