Presentation 2000/5/18
Public-Key Encryption Schmes:EPOC and PSEC
Tatsuaki Okamoto, Eiichiro Fujisaki, Shigenori Uchiyama, Hikaru Morita,
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Abstract(in Japanese) (See Japanese page)
Abstract(in English) We describe two novel public-key encryption Schemes, EPOC (Efficient Probalistic Public-Key Encryption) and PSEC (provably secure elliptic curve encryption), which have been proven to be secure in the strongest sense (non-malleable against chosen ciphertext attacks) under reasonable assumptions and the random oracle model. EPOC and PSEC have two versions respectively: EPOC-1 and EPOC-2, and PSEC-1 and PSEC-2. EPOC-1 and PSEC-1 are public-key encryption systems that use a one-way trapdoor function and a random function (hash function). EPOC-2 and PSEC-2 are public-key encryption systems that use a one-way trapdoor function, two random functions (hash function) and a symmetric-key encryption (e. g., one-time padding and block-ciphers). EPOC is based on the factoring problem and PSEC is on the eliptic curve discrete logarithm problem.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) public-key cryptosystems / provable security / elliptic curve cryptosystems / CA
Paper # ISEC2000-9
Date of Issue

Conference Information
Committee ISEC
Conference Date 2000/5/18(1days)
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Place (in English)
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Paper Information
Registration To Information Security (ISEC)
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) Public-Key Encryption Schmes:EPOC and PSEC
Sub Title (in English)
Keyword(1) public-key cryptosystems
Keyword(2) provable security
Keyword(3) elliptic curve cryptosystems
Keyword(4) CA
1st Author's Name Tatsuaki Okamoto
1st Author's Affiliation NTT Laboratories()
2nd Author's Name Eiichiro Fujisaki
2nd Author's Affiliation NTT Laboratories
3rd Author's Name Shigenori Uchiyama
3rd Author's Affiliation NTT Laboratories
4th Author's Name Hikaru Morita
4th Author's Affiliation NTT Laboratories
Date 2000/5/18
Paper # ISEC2000-9
Volume (vol) vol.100
Number (no) 76
Page pp.pp.-
#Pages 15
Date of Issue