Ryo NOJIMA


Generic Fully Simulatable Adaptive Oblivious Transfer
Kaoru KUROSAWA Ryo NOJIMA Le Trieu PHONG 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2015/01/01
Vol. E98-A  No. 1  pp. 232-245
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Foundation
Keyword: 
adaptive OTfully-simulatableverifiable shufflespermutation networksloose homomorphism
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Relation between Verifiable Random Functions and Convertible Undeniable Signatures, and New Constructions
Kaoru KUROSAWA Ryo NOJIMA Le Trieu PHONG 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2014/01/01
Vol. E97-A  No. 1  pp. 215-224
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Public Key Based Cryptography
Keyword: 
selectively convertible undeniable signaturesverifiable random functionstandard model
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Using Trapdoor Permutations in a Complete Subtree Method for Broadcast Encryption
Ryo NOJIMA Yuichi KAJI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2005/02/01
Vol. E88-A  No. 2  pp. 568-574
Type of Manuscript:  PAPER
Category: Information Security
Keyword: 
key managementbroadcast encryptionstateless receiverstrapdoor permutationsclaw-free permutations
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Secure, Efficient and Practical Key Management Scheme in the Complete-Subtree Method
Ryo NOJIMA Yuichi KAJI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2005/01/01
Vol. E88-A  No. 1  pp. 189-194
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Application
Keyword: 
key managementbroadcast encryptioncomplete subtree methodstateless receiverstrapdoor permutationsrandom oracle model
 Summary | Full Text:PDF