Cryptographic system

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United States of America Patent

PATENT NO 9722783
APP PUB NO 20150229472A1
SERIAL NO

14421282

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Abstract

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An inner-product predicate encryption scheme with improved flexibility without a restriction that the dimensions of an attribute vector x→ and a predicate vector v→ should be equivalent. A ciphertext having an element c0 and an element ct for each index t included in a set Ix→ is decrypted with a decryption key having an element k0 and an element kt for each index t included in a set Iv→ by computing a product of pairing operations between corresponding pairs of basis vectors on the element c0 and the element k0 and on the element ct and the element kt.

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Patent Owner(s)

  • MITSUBISHI ELECTRIC CORPORATION;NIPPON TELEGRAPH AND TELEPHONE CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Okamoto, Tatsuaki Tokyo, JP 30 1679
Takashima, Katsuyuki Tokyo, JP 33 382

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