Simon Friedberger
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View article: Efail: Breaking S/MIME and OpenPGP Email Encryption using Exfiltration Channels
Efail: Breaking S/MIME and OpenPGP Email Encryption using Exfiltration Channels Open
OpenPGP and S/MIME are the two prime standards for providing end-to-end security for emails. We describe novel attacks built upon a technique we call malleability gadgets to reveal the plaintext of encrypted emails. We use CBC/CFB gadgets …
View article: Arithmetic Considerations for Isogeny-Based Cryptography
Arithmetic Considerations for Isogeny-Based Cryptography Open
In this paper we investigate various arithmetic techniques which can be used to potentially enhance the performance in the supersingular isogeny Diffie-Hellman (SIDH) key-exchange protocol which is one of the more recent contenders in the …
View article: Fast Arithmetic Modulo 2xpy±1
Fast Arithmetic Modulo 2xpy±1 Open
We give a systematic overview of techniques to compute efficient arithmetic modulo 2xpy±12xpy±1. This is useful for computations in the supersingular isogeny Diffie-Hellman (SIDH) key-exchange protocol which is one of the more recent conte…