things we do
Design Bitcoin Security Products
We built Revault (Bitcoin custody for organisations), Liana (Bitcoin wallet leveraging on-chain timelocks), and more to come.
Protocol and Architecture Reviews
We have many years of experience designing security protocols, we offer security advice and reviews for other projects.
Bitcoin Core and Open Source Contributions
We strongly believe in Open Source, especially for security. We contribute to Bitcoin Core and other projects, and we open source our security products too.
We work with multiple security-focused developers capable of reviewing code and find weaknesses before someone malintentionned can.
We are very good at breaking things. We often find vulnerabilities and report them following the best practices around responsible disclosures. We love bug bounties!
Operational Security Advice and Assessments
Mapping risks and threats, suggesting mitigations and giving our opinion on your operational security.
Wizardsardine is a Bitcoin security company. If you have a problem that needs solving and you feel we might be able to help, contact firstname.lastname@example.org
things we build
Talk to us
Have a Bitcoin related problem that needs email@example.com
Implementing RBF functionality in Liana
An overview of how we implemented RBF functionality in Liana and some of the problems we faced
Liana 4.0 release and 2023 retrospective
Announcing the fourth version of Liana and looking back on a year of developing the first Bitcoin wallet focused on recovery.