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jb

Jean-Baptiste Bédrune

Head of Security Research

4 posts •
Donjon

On the security model of software wallets

29 July 2021

A cryptocurrency wallet is a device or application able to manage cryptocurrencies and perform transactions for one or several cryptocurrencies. Its main security features are to store user’s private keys, and use them

Jean-Baptiste Bédrune + 1 13 min read
Donjon

Kaspersky Password Manager: All your passwords are belong to us

6 July 2021

The password generator included in Kaspersky Password Manager had several problems. The most critical one is that it used a PRNG not suited for cryptographic purposes. Its single source of entropy was the

Jean-Baptiste Bédrune 18 min read
Donjon

Everybody be Cool, This is a Robbery!

9 August 2019

The Ledger Donjon spends significant time and effort to assess the security of every piece of Ledger technology — along with our industry’s. During a recent security audit we uncovered vulnerabilities in a

Jean-Baptiste Bédrune + 1 7 min read
Donjon

Funds are SSSAFU - Stealing the funds of all HTC EXODUS 1 users

16 July 2019

HTC EXODUS 1 phones come with an integrated hardware wallet. This wallet allows to backup its [master seed](https://bitcoin.org/en/glossary/hd-wallet-seed) by splitting it and sending it to "trusted contacts". Three trusted contacts are normally required

Jean-Baptiste Bédrune 14 min read
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