Homomorphic passcode encryption

US10719828B2 · kind B2 · utility

Assignee

• INC SQUARE, CO., LTD · JP

Inventors

• Oliver S. C. Quigley · San Francisco, US
• Jason Waddle · Alameda, US
• Benjamin Michael Adida · San Francisco, US
• Max Guise · San Francisco, US

Key dates

• Filing date: Mar 13, 2014
• Grant date: Jul 21, 2020
• Expiry date: Jan 30, 2037

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L9/3226
• WIPO field: IT methods for management
• WIPO sector: Electrical engineering

Abstract

A method of encrypting a passcode is disclosed. In one embodiment, the method includes: receiving an indication of a portion of the passcode; calculating a plaintext value based at least in part on the indication, wherein the plaintext value represents an encoded portion of the passcode; encrypting the plaintext value into ciphertext using a homomorphic encryption system; and updating a cumulative encryption string by executing a cumulative operation to aggregate the ciphertext corresponding to the encoded portion into the cumulative encryption string computed for a previous portion of the passcode, wherein the cumulative operation is dictated by a homomorphic property of the homomorphic encryption system.