Stealth Key Exchange and Confined Access to the Record Protocol Data in TLS 1.3

ePrint Report: Stealth Key Exchange and Confined Access to the Record Protocol Data in TLS 1.3

Marc Fischlin

We show how to embed a covert key exchange sub protocol within a regular TLS 1.3 execution, generating a stealth key in addition to the regular session keys. The idea, which has appeared in the literature before, is to use the exchanged nonces to transport another key value. Our contribution is to give a rigorous model and analysis of the security of …

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