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. 03, 2026
Filed:
Feb. 21, 2022
Google Llc, Mountain View, CA (US);
Pirmin Robert Vogel, Zurich, CH;
Google LLC, Mountain View, CA (US);
Abstract
This document discloses techniques, apparatuses, and systems for secure pseudo-random number generator (PRNG) reseeding. Integrated circuits (ICs) may use PRNGs to enable cryptographic processes that can protect an IC or electronic device against malicious attacks. Generally, an IC (e.g., a security circuit) may seed or reseed a PRNG with entropy useful to generate pseudo-random numbers or bits. In generating entropy, however, operation of the IC may change and result in circuit characteristics that allow attackers to determine when the IC operates on entropy-related secret information. In this way, attackers may identify moments when attacks have a higher chance of revealing the secret information. In aspects of secure PRNG reseeding, security circuitry may operate circuit elements to limit an association between circuit operations related to entropy generation and observable circuit characteristics. In doing so, the IC may implement cryptographic operations without enabling the detection of circuit operations on secret information.