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-----