Payments Startup Square Is Open-Sourcing Its Bitcoin Cold Storage Solution

Mobile payments startup Square (NYSE:SQ) is making its bitcoin cold storage solution open-source.

Alok Menghrajani, a security engineer for the company, announced in a blog post on Tuesday that the documentation, code and tools for the company’s “Subzero” bitcoin cold storage solution are now publicly available on Github.

Menghrajani said Square uses Subzero to hold bitcoin assets on its users’ behalf in an offline environment based on a hardware security module (HSM) – the same technology the firm has been using to store encrypted keys for its other payments services.

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