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:
May. 12, 2020
Filed:
Sep. 03, 2018
Shenzhen Fhe Technologies Co., Ltd, Shenzhen, CN;
Heping HU, Shenzhen, CN;
SHENZHEN FHE TECHNOLOGIES CO., LTD, Shenzhen, CN;
HEPING HU, Shenzhen, CN;
Abstract
A fully homomorphic encrypted ciphertext query method, the method including: acquiring a first plaintext, encrypting the first plaintext using a symmetric-key algorithm or a public-key algorithm to yield a first ciphertext, and storing the first ciphertext as a queried object; receiving a second plaintext which corresponds to a query condition, encrypting the second plaintext using a symmetric-key algorithm or a public-key algorithm to yield a second ciphertext, and storing the second ciphertext as a query object; performing bitwise summation on the queried object and the query object, to acquire a ciphertext query result; and decrypting the ciphertext query result to yield a decrypted plaintext, and comparing the decrypted plaintext with the second plaintext, determining, if the decrypted plaintext is the same as the second plaintext, the ciphertext query result is correct, and the query object exists in the queried object; otherwise, determining the ciphertext query result is incorrect.