You have reached the BTC Piñata.


BTC Piñata knows the private key to the bitcoin address 183XuXTTgnfYfKcHbJ4sZeF46a49Fnihdh. If you break the Piñata, you get to keep what's inside.

Here are the rules of the game:

And here's the kicker: in both the client and server roles, Piñata requires the other end to present a certificate. Authentication is performed using standard path validation with a single certificate as the trust anchor. And no, you can't have the certificate key.

It follows that it should be impossible to successfully establish a TLS connection as long as Piñata is working properly. To get the spoils, you have to smash it.

Before you ask: yes, Piñata will talk to itself and you can enjoy watching it do so.


BTC Piñata is a MirageOS unikernel using not quite so broken software. It is written in OCaml, runs directly on Xen, and is using native OCaml TLS and X.509 implementations.

The full list of installed software and a toy unikernel without secrets are available. There is no need to use the old automated tools on Piñata - roll your own instead. This challenge runs until the above address no longer contains the 10 bitcoins it started with, or until we lose interest.

Why are we doing this? At the beginning of 2014 we started to develop a not quite so broken TLS implementation from scratch. You can read more about it on https://nqsb.io or watch our 31c3 talk about it. Now, we want to boost our confidence in the TLS implementation we've developed and show that robust systems software can be written in a functional language. We recapitulated the first five months of the Piñata.

We are well aware that bounties can only disprove the security of a system, and never prove it. We won't take home the message that we are 'unbreakable', 'correct', and especially not 'secure'. But we don't rely on obscurity and have a fully transparent implementation of a well-known protocol. Our prize is publicly observable in the blockchain. If you observe a transaction, it is taken. So if this contest attracts attention and we are still standing at the end of it, we will gain that extra inch of confidence in our work.

This page is also available via HTTPS. It will present a certificate signed by the same authority that Piñata expects to sign all of the incoming requests, so your browser will complain. The purpose of HTTPS is to allow checking of interoperability with our TLS implementation.


Bitcoins and the hosting for this challenge are sponsored by IPredator, a friendly virtual private network provider!

If you have any results or further questions, don't hesitate to contact us. Address is anything at nqsb dot io.


This is the CA:

-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----