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AnonNo15 on Oct 7, 2014 | parent | context | favorite | on: Twitter sues U.S. government over ability to discl...

You can do it right now by embedding such message in Bitcoin blockchain. It will give you tamper-proof and timestamped message.

rsync on Oct 8, 2014 [–]

A bit easier is to simply include a news headline in the signed message:

http://www.rsync.net/resources/notices/canary.txt

It's not as sophisticated as the blockchain, etc., but about as good - if you pick sensitive pieces of financial news it's clear you could not have known about them in advance. Or sports results.

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