In this post, we discover a strange creature named Modulo Bias, learn how it is born, why it is so dangerous, and how to fight
Tag: Crypto
Audit of AMIS’ Hierarchical Threshold Signature Scheme
AMIS implemented a hierarchical variant of threshold signatures, using different levels/ranks in its distributed key generation (DKG) and signing logic, based on a previous research paper.
CVE-2020-0601: the ChainOfFools/CurveBall attack explained with PoC
On Tuesday the 14th of January 2020, in the frame of their first Patch Tuesday of 2020, Microsoft addressed a critical flaw discovered by the
Forget Homomorphic Encryption, Here Comes Functional Encryption
Have you ever heard of Functional Encryption (FE)? If so, you may be associating it with some sort of homomorphic encryption, which is not wrong,
Audit of Binance TSS-lib
Binance created an open source software library available on Github implementing a threshold ECDSA signature scheme (TSS), and hired Kudelski Security to perform a security
Introducing FumbleChain – A Purposefully Vulnerable Blockchain
Hello everyone, today we are happy to announce FumbleChain, a purposefully vulnerable blockchain implementation. This project has been a labor of love for the Research
Kudelski Security Research 