Discovering Zcash' infinite counterfeiting bug

This is a past event

12 people went


Welcome to this year's 5th Kraków Bitcoin Meetup, where Ariel Gabizon will talk about discovering first hand a critical counterfeiting bug in ZCash.

The story about the critical bug made big headlines in the global crypto sphere early in 2019, after Ariel and only a handful of his colleagues had been scrambling in secrecy to fix the bug for almost an entire year.

Show up to the meetup on Friday and let Ariel take you to the inside of how the drama unfolded. Also, get beer, pizza and new connections while you're at it!


The Kraków Bitcoin Meetup is an initiative for Bitcoin enthusiasts in the city of Kraków, Poland, organized by BitSpace. The event is held frequently and aims to connect the brightest local crypto minds together. It also aims to provide educational value through presentations and workshops for people who want to learn more about Bitcoin. Even though this event is primarily about Bitcoin, you are of course permitted to mention other cryptocurrencies :)

The events are free of charge, and there are no knowledge requirements for you to participate. Come and learn!

Please invite other people who might be interested in attending.


If you have something to share or announce with the meetup, give a heads up and the stage is yours. Anything that might be valuable for a local crowd of bitcoiners is very welcome.

Additionally, we're always looking for interesting speakers to talk at the meetups. if you or someone you know has insightful things to say on a Bitcoin-related topic, don't hesitate to discuss it with me, and we will schedule a talk.

BitSpace (

Beam (

Forklog (
BlockchainFiesta (
The Reserve (

Join the Krakow Bitcoin Forum: