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March 11, 2024
Decentralized Multi-Client Functional Encryption (DMCFE) is a multi-user extension of Functional Encryption (FE) without relying on a trusted third party. However, a fundamental requirement for DMCFE is that the decryptor must collect the partial functional keys and the ciphertexts from all clients. If one client does not generate the partial functional key or the ciphertext, the decryptor cannot obtain any useful information. We found that this strong requirement limits the application of DMCFE...
September 28, 2023
Sunnyvale, Calif. – Sept. 26, 2023 – NTT Research, Inc., a division of NTT (TYO:9432), today announced that it has named Timothée Leleu as Senior Research [...]
September 13, 2023
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 a...
August 17, 2023
NTT and NTT Research Also Contribute 15 Papers to Crypto 2023 ...
February 18, 2022
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,...
February 10, 2022
/PRNewswire/ -- Ruby, a privacy-first layer 1 blockchain, today announced the close of a $7.3 million round of funding with participation from venture capital...
February 9, 2022
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