Symmetric-Key Cryptographic Technique Evaluation Policy
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1 Symmetric-Key Cryptographic Technique Evaluation Policy Toshinobu Kaneko Chair, Symmetric-Key Subcommittee (Science University of Tokyo)
2 Symmetric-Key Cryptography Subcommittee K.Araki (TIT) T.Kaneko (SUT) S.Kawamura (Toshiba) M.Kanda (NTT) T.Kohda (Kyushu U.) K.Kobara (U. of Tokyo) K.Sakurai (Kyusyu U.) T.Shimoyama (Fujitsu) K.Takaragi (Hitachi) M.Tatebayashi (Matsushita) Y.Tsunoo (NEC) T.Tokita (Mitsubishi) M.Morii (Tokushima U.) 13 members
3 Cryptographic Technologies Symmetric ciphers 64-bit block cipher (key length 128 bits) 128-bit block cipher (key length 128 bits) stream cipher (IV 128 bits, State 128 bits) Hash Function 160-bit or longer hash value PRNG
4 (1a.) General Evaluation (Newly Submitted Tech.) Stream Cipher C4-1 (Focus) FSAngo (Fuji Soft) MUGI (Hitachi) PRNG RNG by Clutter Box (HMI) FSRansu (Fuji Soft) RNE (SIL) TAO TIME (JCN)
5 General Evaluation (Newly Submitted Tech.) (cont.) Screening evaluation (Oct.2001~Mar.2002) Submission completeness examination Security evaluation (examine trivial weakness) (based on the self evaluation report by experts) Stream Cipher statistical properties, length of period & linear complexity resistance against well known attack and heuristic attack PRNG statistical properties with randomness tests etc. resistance against attacks, unpredictability
6 Screening evaluation (Oct.01 ~Mar.02 ) (cont) Implementation aspects (Stream Cipher & PRNG) implementability by third parties sufficient information in the specification disclosure to public for evaluation. not require extremely special HW Superior or equal feature ( for security or performance ) to the existing techniques in CRYPTREC 2000 project. Call for public comments
7 Full (detailed) evaluation Schedule April.2002~ (selected techniques in 2001) Oct.2000~March.2001 (techniques in 2000) Security Evaluation Inspect weakness in detail pdf e.pdf includes external experts evaluation in Japan and abroad
8 Full evaluation (cont.) Security Evaluation Block cipher well-known attacks (DC & LC) other attacks (HOD, SA,etc) heuristic attack Stream Cipher statistical properties (period, Linear complexity, etc) well-known attacks (correlation, divide & conquer,..) heuristic attack
9 Full evaluation (cont.2) Hash Function one way, collision free in practical time well-known attack ( DC, algebraic attack) statistical properties heuristic attack PRNG statistical properties with randomness (FIPS140-1) unpredictability, heuristic attack
10 Full evaluation (cont.3) Implementation Block & stream cipher Software: encryption, key scheduling ( speed, memory usage) Hardware: process, speed, resource used Hash function Software/Hardware PRNG Software
11 (1b.) General Evaluation Continual (Follow-up) fully evaluated in 2000 & deserve further evaluation status of availability clarified by the applicant 64-bit Block Cipher CIPHERUNICORN-E (NEC) * Hierocrypt-L1 (Toshiba) MISTY1 (Mitsubishi) T-DES *needs further detailed evaluation
12 Continual (Follow-up) evaluation (cont.) 128-bit Block Cipher Camellia (NTT&Mitsubishi) CIPHERUNICORN-A (NEC) * Hierocrypt-3 (Toshiba) RC6 Block Cipher (RSA) SC2000 (Fujitsu) AES *
13 Continual (Follow-up) evaluation (cont.2) Stream Cipher MULTI-S01 (Hitachi) * Hash function RIPEMD-160 SHA-1 SHA-256, -384, 512 * PRNG PRNG based on SHA-1
14 (2a.1) Specific Evaluation evaluation request from Japanese national committee of ISO/IEC JTC1/SC27 Cryptographic techniques (64-bit) MISTY1, Hirocrypt-L1 (128-bit) Camellia, Hierocrypt-3, SC2000 CRYPTREC2000 Report + additional evaluation
15 Additional Evaluation Items Software Implementation feature on Z80 Compared to the property of Rijndael RAM restriction: around 66 bytes Memory usage (RAM, ROM) Speed for a block encryption 128-bit Block Ciphers
16 Z80 Software Implementation RAM [Bytes] ROM [Bytes] Enc/Dec Speed 5MHz Z80 [ms] Camellia /8 HC /14 SC /19 Rijndael 66* - - Ref. data by J- SC27.
17 Additional Evaluation Items (cont.) Comments on J-SC27 report On the Technical Maturity of Cryptographic Security of Block Ciphers Comments on J-SC27 report On the HW Implementation features of 128-bit block ciphers Comments on Toshiba report On the Difference of Hierocrypt-3 and Rijndael
18 (2a.2) Specific Evaluation Request from J-SC27 Evaluation on some cryptographic techniques proposed to SC27 we will discuss & negotiate
19 (2.b) Specific Evaluation Request from the working groups discussing requirements for cryptographic techniques and guidelines concerning to the Japanese e-govermment Evaluation on cryptographic technique used in SSL or S/MIME environment (RC2,RC4, Arcfour) needs discussion on the details
20 (3) Call for attack Call for attack to these cryptographic techniques Any comments are welcome to CRYPTREC If you write a paper on the subject, please let us know ( cryptrec-comment@ipa.go.jp )
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