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:
Mar. 12, 2019
Filed:
Mar. 22, 2016
International Business Machines Corporation, Armonk, NY (US);
Jan L. Camenisch, Thalwil, CH;
Maria Dubovitskaya, Zurich, CH;
Anja Lehmann, Zurich, CH;
Gregory Neven, Oberrieden, CH;
INTERNATIONAL BUSINESS MACHINES CORPORATION, Armonk, NY (US);
Abstract
The invention performs anonymous read/write accesses of a set of user devices to a server. Write accesses of the user devices of the set comprise generating an encrypted file by an anonymous encryption scheme; computing a pseudorandom tag; indexing the encrypted file with the tag as user set index of the user set and writing the encrypted file and the associated tag to the a storage system of the server. Read accesses of the user devices of the set comprise downloading tag data corresponding to a plurality of tags from the server, the tag data enabling the user devices of a respective set to recognize so-called 'own' tags computed by one of the user devices of the respective set of user devices; determining the own tags among the plurality of tags; reading one or more encrypted files associated to the own tags; and decrypting the encrypted files.