Rephrasing TLS key exchange in terms of KEMs
In the RFC for TLS 1.3 (RFC8446) especially, the key exchange is defined in terms of (EC)DH key shares being exchanged. This limits us to algorithms which support non-interactive …
Thom Wiggers
Senior Cryptography Researcher
Thom Wiggers is a cryptography researcher at PQShield.
His PhD thesis was on the interactions of post-quantum cryptography with protocols, under the supervision of Peter Schwabe, at the Institute of Computing and Information Sciences, Radboud University in The Netherlands.
Using (post-quantum) KEMs in TLS 1.3
The new TLS 1.3 standard \[1\] does not yet provide any support for post-quantum algorithms. In this blog post we’ll be talking about how we could negotiate a post-quantum key …
Solving LPN using Large Covering Codes
Learning Parity with Noise (LPN) is a computational problem that we can use for cryptographic algorithms. It is suspected that LPN can not be solved (much) more efficiently on a …
Latincrypt paper!
I’m going to Cuba as my submission to Latincrypt 2017 was accepted! The paper is called Energy-efficient ARM64 Cluster with Cryptanalytic Applications: 80 cores that do not cost …
Securing OpenSSH
You can set up SSH to prefer Elliptic Curve cryptography over RSA, and use modern key exchange algorithms without exposing yourself to Logjam-style attacks. It’s also good to get …
Implementing CAESAR candidate Prøst on ARM11
Prøst was a contestant in the CAESAR competition for Authenticated Encryption. I optimised Prøst for the ARM11 microprocessor architecture. By trying to find a provably minimal …
Prøst at Student Research Conference
In July, Peter Schwabe, who supervised my Bachelor’s thesis project, suggested to submit my work to the Student Research Conference. It then turned out that the deadline was the …
Bitcoin private key qrcode scraper
Tegenlicht today had an episode about Bitcoin where they announced they were going to give away €100 in Bitcoin. They were going to put up a Bitcoin wallet private key as a QR-code …
Deprecating fields in MongoEngine Documents
I’ve had to rename some fields today with MongoEngine. Using the following approach, I was able to raise DeprecationWarnings when old version were used. Create the following …