Objeto de conferencia
Improving a Compact Cipher Based on Non Commutative Rings of Quaternion
Registro en:
Autor
Kamlofsky, Jorge
Institución
Resumen
Asymmetric cryptography is required to start encrypted communications. Most protocols are based on modular operations over integer's rings. Many are vulnerable to sub-exponential attacks or by using a quantum computer. Cryptography based on non-commutative algebra is a growing trend arising as a solid choice that strengthens these protocols. In particular, Hecht (2009) has presented a key exchange model based on the Diffie-Hellman protocol using matrices of order four with elements in Z256, that provides 128-bits keys also to devices with low computing power. Quaternions are four-component's vectors.
These also form non-commutative rings structures, with compact notation and lower run-times in many comparable operations. Kamlofsky et al (2015) presented a model using quaternions with elements in Z256. To provide a 128-bit key is required 4 rounds of 32-bits. However, a gain of 42% was obtained. This paper presents an improvement of this cipher that reduces even more the run-times. V Workshop de Seguridad Informática. Red de Universidades con Carreras en Informática (RedUNCI)