Decryption Oracles

Dissertation: Exploring Corner Cases of Modern Applied Cryptography
The advent of instantaneous communication via the Internet in the 80s and 90s has revolutionized the way we communicate. Suddenly, we …
Fabian Ising
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Content-Type: Multipart/Oracle - Tapping into Format Oracles in Email End-to-End Encryption
S/MIME and OpenPGP use cryptographic constructions repeatedly shown to be vulnerable to format oracle attacks in protocols like TLS, …
Fabian Ising, Damian Poddebniak, Tobias Kappert, Christoph Saatjohann, Sebastian Schinzel
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Practical Decryption exFiltration: Breaking PDF Encryption
The Portable Document Format, better known as PDF, is one of the most widely used document formats worldwide, and in order to ensure …
Jens Müller, Fabian Ising, Vladislav Mladenov, Christian Mainka, Sebastian Schinzel, Jörg Schwenk
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Efail: Breaking S/MIME and OpenPGP Email Encryption Using Exfiltration Channels
OpenPGP and S/MIME are the two prime standards for providing end-to-end security for emails. We describe novel attacks built upon a …
Damian Poddebniak, Christian Dresen, Jens Müller, Fabian Ising, Sebastian Schinzel, Simon Friedberger, Juraj Somorovsky, Jörg Schwenk
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Master's Thesis: Analyzing Oracle Attacks against E-mail End-to-End Encryption
Fabian Ising
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