A team of bitcoiners with a passion for security

Things we work on

Revault

A complete, sovereign and open-source institutional custody solution using Bitcoin smart contracts.

Liana

A modern day to day bitcoin wallet including inheritance solutions, safer backups, and more.

Our store

(Coming soon!)

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Both a physical location where we help people and companies with disaster recovery, and an online store providing products and services.

Let's talk

We are always happy to chat if you want to work with us, or have a problem that needs solving. We focus on security, with a strong emphasis on open source.

hello@wizardsardine.com

Our musings

Bitcoin

Backups

History

State of the art for Bitcoin wallet backups

A historical inquiry on wallet backups since the very first Bitcoin release to the latest most featureful wallets.

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Bitcoin

Custody

What does bitcoin custody look like today?

Secure bitcoin private key management is now critical for many private businesses, publicly-traded companies and individuals across the world who hold bitcoin. As of today, and considering a 75% market downturn since its all time high, roughly $405 billion worth of bitcoin is held in various ways.

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Bitcoin

Liana

Announcing Liana

Today we are releasing the first version of Liana, a simple self-custody solution that puts the emphasis on protecting against loss without degrading security.

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