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US 12,756,537 B2Granted
Anonymous data retrieval method, client and server
AssigneeLenovo (Beijing) Limited
InventorsYilong Ma, Xiaobing Guo
Life of this patent
Estimating the term…
Abstract
An anonymous data retrieval method includes obtaining retrieval data and a first label provided by a server and matching the retrieval data, performing linear homomorphic encryption on the retrieval data and the first label to obtain retrieval data ciphertext, searching the server for a second label according to the retrieval data ciphertext, and performing anonymous retrieval on the server according to the second label and encrypted first label to obtain candidate data that matches the retrieval data.
Claims17
An anonymous data retrieval method comprising:
- obtaining retrieval data and a first label matching the retrieval data;
- performing linear homomorphic encryption on the retrieval data and the first label to obtain retrieval data ciphertext;
- searching a server for a second label according to the retrieval data ciphertext;
- and
- performing anonymous retrieval on the server according to the second label and encrypted first label to obtain candidate data that matches the retrieval data.
2 more elements
An anonymous data retrieval method comprising:
- receiving retrieval data ciphertext from a client, the retrieval data ciphertext being obtained by the client performing linear homomorphic encryption on a first label and retrieval data, and the first label matching the retrieval data;
- providing a second label to the client based on the retrieval data ciphertext;
- and
- in response to anonymous retrieval initiated by the client based on the second label and an encrypted first label, providing candidate data matching the retrieval data to the client.
1 more element
Dependencies are inferred from the claim text.