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"DFE-IP: Delegatable functional encryption for inner product" by Jinguang Han, Liqun Chen et al.

Functional encryption for inner product (FE-IP) allows an authorized user to obtain the inner product of the vectors embedded in his/her secret key and a ciphertext, respectively. Therefore, it is an elegant tool to implement secure computation over encrypted data. Existing FE-IP schemes mainly considered security and function privacy issues, but did not address the decryption delegation problem. However, in practice, delegating decryption is desirable when an authorized user is unavailable to access the system due to leaving, network problems, etc. In this paper, a delegatable FE-IP (DFE-IP) scheme is proposed to support decryption delegation. Our scheme provides the following important features: (1) a delegator can delegate his/her decryption power to a delegatee; (2) a proxy is not required to re-encrypt ciphertexts; (3) it supports temporary delegation and flexible revocation. We first formalize our DFE-IP scheme including definition and security model, and then describe a concrete ....

Functional Encryption , Inner Product ,

NTT Research CIS Lab Director Wins Second IACR Test-of-Time Award for Paper on Oblivious Transfer

NTT and NTT Research Also Contribute 15 Papers to Crypto 2023

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Scott Aaronson , Daniel Wichs , Chris Peikert , Vipul Goyal , Hugo Krawczyk , Mark Zhandry , Arka Rai Choudhuri , Junichi Tomida , Santa Barbara , Sanjam Garg , Vinod Vaikuntanathan , Ilan Komargodski , Elette Boyle , Lab Brent Waters , Algorand Foundation , Lab Senior Scientist Hoeteck Wee , Party Computation , International Association For Cryptologic Research , Ntt Research Inc , University Of Texas , Health Informatics , Distinguished Scientist , Information Security , International Association , Cryptologic Research , Composable Oblivious Transfer ,

Prove Anything Announces Strategic Partnership With Ruby Protocol To Bring Forward Private Data Management Framework For Web 3.0

Prove Anything Announces Strategic Partnership With Ruby Protocol To Bring Forward Private Data Management Framework For Web 3.0
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City Of , United Kingdom , Glenn Shoosmith , Mindaugas Savickas , Ruby Protocol Functional , Ruby Protocol , Prove Anything , Functional Encryption , General Manager , Prove Any ,

NTT Research Names Brent Waters as CIS Lab Director

NTT Research Names Brent Waters as CIS Lab Director
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United States , Elette Boyle , Amit Sahai , Tatsuaki Okamoto , Kazuhiro Gomi , University Of California At Los Angeles , Lab Senior Scientist Dr , Computer Science At Reichman University In Herzliya , Research On Foundations , Association For Computing Machinery , Department Of Computer Science , University Of Texas At Austin , Japan Society For Industrial , Simons Foundation , International Association Of Cryptology Research , Research Inc , Brent Waters , Information Security , Distinguished Scientist , Computer Science , Computing Machinery , Grace Murray Hopper Award , Functional Encryption , Japan Society , Applied Mathematics , International Association ,

"Functional Encryption for Pattern Matching with a Hidden String" by Jongkil Kim, Yang Wai Chow et al.

We propose a new functional encryption for pattern matching scheme with a hidden string. In functional encryption for pattern matching (FEPM), access to a message is controlled by its description and a private key that is used to evaluate the description for decryption. In particular, the description with which the ciphertext is associated is an arbitrary string w and the ciphertext can only be decrypted if its description matches the predicate of a private key which is also a string. Therefore, it provides fine-grained access control through pattern matching alone. Unlike related schemes in the literature, our scheme hides the description that the ciphertext is associated with. In many practical scenarios, the description of the ciphertext cannot be public information as an attacker may abuse the message description to identify the data owner or classify the target ciphertext before decrypting it. Moreover, some data owners may not agree to reveal any ciphertext information since it s ....

Functional Encryption , Attern Matching System , Searchable Encryption ,