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AURORA is a new cryptographic hash algorithm family developed by Sony in cooperation with Tetsu Iwata, Associate Professor, Nagoya University. The AURORA family consists of the algorithms: AURORA-224, AURORA-256, AURORA-384, AURORA-512, AURORA-224M, and AURORA-256M, where AURORA-224M and AURORA-256M are optional instances that are designed to have multicollision resistance. AURORA-224 and AURORA-256 are constructed from the secure and efficient compression function using a security-enhanced Merkle-Damgaard transform, i.e., the strengthened Merkle-Damgaard transform with the finalization function. The compression function is designed based on the well-established design techniques for blockciphers, and uses the Davies-Meyer construction. AURORA-384 and AURORA-512 employ a novel domain extension transform called the Double-Mix Merkle-Damgaard (DMMD) transform. This domain extension transform enables an efficient collision-resistant construction for double length hash functions. The overall structure of AURORA-224M and AURORA-256M is the same as AURORA-384/512 except constants and the final mixing function.
[Notice on the updated version of AURORA-384/512] Now modified version of part of AURORA algorithms, which are called AURORA-384 version 2 and AURORA-512 version 2, are available on this website. Detailed information is available on the download page .
Following tables show a summary of currently known performance results of AURORA.
Table 1 : Software Performance
*On NIST reference platform.
Table 2 : Hardware Performance
*Using 0.13 µm CMOS ASIC Library.