Presentation	2000/9/21 Public-key Encryption Schemes : EPOC-3 and PSEC-3 Tatsuaki Okamoto, David Pointcheval,
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Abstract(in English)	We describe two novel public-key encryption schemes, EPOC-3 and PSEC-3, 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. Although EPOC-3 and PSEC-3 require stronger assumptions than EPOC-2 and PSEC-2, EPOC-3 and PSEC-3 are more efficient in decryption. Similarly to EPOC-2 and PSEC-2, EPOC-2 and PSEC-2 are public-key encryption systems that use a one-way trapdoor function, two random functions(hash functions)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 elliptic curve discrete logarithm problem.
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Keyword(in English)	public-key cryptosystems / provable security / elliptic curve cryptosystems / CA
Paper #	ISEC2000-66
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Conference Information
Committee	ISEC
Conference Date	2000/9/21(1days)
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Paper Information
Registration To	Information Security (ISEC)
Language	ENG
Title (in Japanese)	(See Japanese page)
Sub Title (in Japanese)	(See Japanese page)
Title (in English)	Public-key Encryption Schemes : EPOC-3 and PSEC-3
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 Laboratorries, Nippon Telegraph and Telephone()
2nd Author's Name	David Pointcheval
2nd Author's Affiliation	Ecole Normale Superieure
Date	2000/9/21
Paper #	ISEC2000-66
Volume (vol)	vol.100
Number (no)	323
Page	pp.pp.-
#Pages	18
Date of Issue