Pratish DATTA


Efficient Attribute-Based Signatures for Unbounded Arithmetic Branching Programs
Pratish DATTA Tatsuaki OKAMOTO Katsuyuki TAKASHIMA 
Publication:   
Publication Date: 2021/01/01
Vol. E104-A  No. 1  pp. 25-57
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
attribute-based signaturesarithmetic branching programsarithmetic span programsconcrete efficiencyunbounded multi-use of attributesbilinear groups
 Summary | Full Text:PDF(1.6MB)

Adaptively Simulation-Secure Attribute-Hiding Predicate Encryption
Pratish DATTA Tatsuaki OKAMOTO Katsuyuki TAKASHIMA 
Publication:   
Publication Date: 2020/07/01
Vol. E103-D  No. 7  pp. 1556-1597
Type of Manuscript:  Special Section PAPER (Special Section on Information and Communication System Security)
Category: Cryptographic Techniques
Keyword: 
predicate encryptionpartially-hidingsimulation-based adaptive securityarithmetic branching programsinner products
 Summary | Full Text:PDF(1.1MB)