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SEED Overview Characteristics Feistel structure with 16 rounds 128-bit input/output data block size 128-bit key length Robust against known attacks such as DC, LC and key related attacks Effectively implemented in software as well as hardware Licensing or royalty payments are not required Korean national-recommended algorithm Mandatory in most area in Korea Feedback from ISO/IEC JTC1/SC27 No shortcomings in the strength of the algorithm are found SEED OID is defined in ISO/IEC 9594-8 iso(1) standard(0) encryption-algorithms(18033) part(3) cipher-128-bit (2) seed(3) Currently selected official block ciphers Accepted : 3DES, AES, MISTY, Camellia Rejected : IDEA, Khazad TBD : SEED, CAST128 (Determined by this coming April) |