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. 17, 2026
Filed:
Aug. 20, 2021
Nec Laboratories Europe Gmbh, Heidelberg, DE;
Claudio Soriente, Heidelberg, DE;
Dario Fiore, Pozuelo de Alarcon, ES;
NEC CORPORATION, Tokyo, JP;
Abstract
A method for cryptographic sortition among a group of parties includes committing, by a first party, to a set of n party-specific secret keys k, kfor a block cipher E and obtaining, by the first and a second party, a common input x and an index r. The method further includes encrypting, by the first party, the input x with the r-th key kof the committed keys k, . . . , k, thereby generating an output yof the block-cipher E, and publishing the output ywith the key kused for encryption. The method further includes encrypting, by the second party, the common input x with the published key k, thereby generating an output y' of the block-cipher E, and comparing the generated output y′ with the published output y. The method can be used to optimize the cryptographic sortition and support secure decision making.