The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 21, 2026
Filed:
Oct. 07, 2024
Ntt Research, Inc., Sunnyvale, CA (US);
Doreen Riepel, San Diego, CA (US);
Hoeteck Wee, Sunnyvale, CA (US);
NTT Research, Inc., Sunnyvale, CA (US);
Abstract
The present disclosure provides a method for key-policy attribute-based encryption. The method includes receiving a message to be encrypted, a master public key, and a set of attributes. A random integer s is sampled between 1 and a prime integer p, where p is established by a pairing-friendly curve comprising three groups of two source groups and one target group. Every attribute in the set is hashed to a first source group of the pairing-friendly curve and multiplied by s to generate a set of attribute encodings. A target group element in the master public key is multiplied by s to generate a blinding factor. The message is masked with the blinding factor. A ciphertext is computed comprising the masked message, the set of attributes, the set of attribute encodings, and an encoding of s in a second source group of the pairing-friendly curve. The ciphertext is then outputted.