OAEP-ES : Methodology of Universal Padding Technique (Asymmetric Cipher) (<Special Section>Cryptography and Information Security)

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概要

• 論文の詳細を見る

• The new concept of ES (Encryption-Signature) schemes which realize an encryption scheme and a signature scheme with a unique padding technique and key pair, was proposed by Coron et al. They also gave a proof of PSS-ES. In this paper, first, we discuss the methodology for the construction for ES schemes by using padding techniques of encryption schemes, and propose a new ES scheme, OAEP-ES, adopting this methodology. It is proven that OAEP-ES scheme can be constructed under the assumption of the one-wayness of the encryption permutation, while the security of PSS-ES utilized as an encryption scheme is based on the partial-domain one-wayness; which is a theoretical progress since the one-wayness is more general assumption than the partial-domain one-wayness. It is shown that OAEP-ES attains tighter security than PSS-ES, which is a practical interest.

• 社団法人電子情報通信学会の論文
• 2004-01-01

著者

• OHTA Kazuo

  University of Electro-Communications

• Komano Y

  Toshiba Corp. Kawasaki‐shi Jpn

• KOMANO Yuichi

  Waseda University

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