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Poster communications

Stream cipher-based scan encryption in test standards

Mathieu da Silva 1 Emanuele Valea 1 Marie-Lise Flottes 1 Giorgio Di Natale 1 Bruno Rouzeyre 1
LIRMM - Laboratoire d'Informatique de Robotique et de Microélectronique de Montpellier
Abstract : Scan chains offer facilities to steal secret information embedded in a circuit. For instance on a crypto-processor, collecting data related to the round register leads to reveal the secret key used for encryption. To protect against this threat while maintaining the test and debug features, countermeasures are implemented on the test interface or on the scan chain itself. Among the countermeasures, some of them are based on stream ciphers, consisting in the encryption of both controlled and observed data in the scan chain. We show in this paper that the stream cipher protection presents vulnerabilities if the keystream generated by the stream cipher is identical after a reset.
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Poster communications
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Contributor : Mathieu da Silva <>
Submitted on : Tuesday, September 4, 2018 - 11:03:32 AM
Last modification on : Tuesday, September 1, 2020 - 11:32:04 AM
Long-term archiving on: : Wednesday, December 5, 2018 - 2:07:36 PM


Stream cipher-based scan encry...
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  • HAL Id : lirmm-01867283, version 1



Mathieu da Silva, Emanuele Valea, Marie-Lise Flottes, Giorgio Di Natale, Bruno Rouzeyre. Stream cipher-based scan encryption in test standards. Colloque du GDR SoC-SiP, Jun 2018, Paris, France. 12ème Colloque National du GDR SoC-SiP, 2018. ⟨lirmm-01867283⟩



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