Cryptology ePrint Archive: Report 2020/780

The Long and Winding Path to Secure Implementation of GlobalPlatform SCP10

Daniel De Almeida Braga and Pierre-Alain Fouque and Mohamed Sabt

Abstract: GlobalPlatform (GP) card specifications are defined for smart cards regarding rigorous security requirements. The increasingly more powerful cards within an open ecosystem of multiple players stipulate that asymmetric-key protocols become necessary. In this paper, we analyze SCP10, which is the Secure Channel Protocol (SCP) that relies on RSA for key exchange and authentication. Our findings are twofold. First, we demonstrate several flaws in the design of SCP10. We discuss the scope of the identified flaws by presenting several attack scenarios in which a malicious attacker can recover all the messages protected by SCP10. We provide a full implementation of these attacks. For instance, an attacker can get the freshly generated session keys in less than three hours. Second, we propose a secure implementation of SCP10 and discuss how it can mitigate the discovered flaws. Finally, we measure the overhead incurred by the implemented countermeasures.

Category / Keywords: implementation / SCP10, Java card, Bleichenbacher, Coppersmith

Original Publication (in the same form): IACR-CHES-2020

Date: received 24 Jun 2020

Contact author: daniel de-almeida-braga at irisa fr, pierre-alain fouque@irisa fr, mohamed sabt@irisa fr

Available format(s): PDF | BibTeX Citation

Note: Experiment-related material is available at

Version: 20200627:184433 (All versions of this report)

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