Apple Inc.

United States of America as Represented by the Secretary of the Air Force

Eric D Laspe

Julien Lerouge

Jon McLachlan

Daniel F Reynaud

Michael A Temple

Rusty O Baldwin

William E Cobb

Eric W Garcia

An obfuscated program can be configured to resist attacks in which an attacker directly calls a non-entry function by verifying that an execution path to the function is an authorized execution path. To detect an unauthorized execution order, a secret value is embedded in each function along an authorized execution path. At runtime, the secrets are combined to generate a runtime representation of the execution path, and the runtime representation is verified against an expected value. To perform the verification, a verification polynomial is evaluated using the runtime representation as input. A verification value result of zero means the execution path is an authorized execution path.

Preventing unauthorized calls to a protected function

A system and method of generating and comparing a fingerprint for an integrated circuit is provided. A sensor module captures electromagnetic emissions from the integrated circuit. A feature extraction module extracts discriminating features from the captured electromagnetic emissions. A classifier training module generates a plurality of authentication fingerprints of the integrated circuit from the extracted discriminating features creating a reference fingerprint template for the integrated circuit. The reference template for the integrated circuit is stored in a database. For authentication, the reference fingerprint template from the database is compared to the generated authentication fingerprint.

Intrinsic physical layer authentication of integrated circuits

Growing community of inventors

San Jose, CA, United States of America

Eric D Laspe