There is a service http://www.cryptograffiti.info/ http://www.cryptograffiti.info/ which can be used for posting sensitive information that should not be remove

There is a service http://www.cryptograffiti.info/ http://www.cryptograffiti.info/ which can be used for posting sensitive information that should not be removed or hidden. It allows to write a message and store it in Bitcoin blockchain as a transaction. It costs near 0.0015 BTC or $1 per kB. Large files can be posted as magnet links to torrents with them. Even if the service's site had been shut down, everyone would always be able to obtain the transaction from it's hash using any bitcoin client/blockchain explorer, convert it to ASCII and read the text. I'd like to note that it is worth to sign with GPG all messages posted that way in order to have ability to post updates and verify authorship.