Jason Dreyzehner (dɹaɪːznər) is a software developer focused on pro-freedom technologies: peer-to-peer money, communication, and identity.

Jason is currently at Bitauth.com. His open source work includes Libauth, Chaingraph, Bitauth, Bitauth IDE, CashChannels, qr-code, and several past upgrades and proposed standards for Bitcoin Cash: CashTokens, BCMRs, ZCEs, VM Numbers, Introspection, VM Limits, Bounded Loops, and AllowReplay.

Jason previously led the design team at BitPay (2013 to 2019), where his open source work included BitPay wallet, Bitcore, Insight, and cordova-plugin-qrscanner.

Beyond this blog, Jason occasionally posts on Bitcoin Cash Research, under bitjson on Reddit, and @bitjson on Twitter.