user9342: When I perform a transaction on the blockchain, I can add a message to the transaction, which will then exist forever in the blockchain.
Say for example I wanted to use the blockchain to store digital assets...
Could this type of information be encrypted and stored as a transaction message, and if so, is there any limit to the message length of a transaction?

user12983: This message exists only on blockchain.info site. It is not a part of bitcoin protocol. You should not think, that it will exists forever, because blockchain.info is  third-party-service
Point your view to a OP_RETURN output scripts. http://bitzuma.com/posts/op-return-and-the-future-of-bitcoin/

9342: <p>When I perform a transaction on the blockchain, I can add a message to the transaction, which will then exist forever in the blockchain.</p>

<p>Say for example I wanted to use the blockchain to store digital assets...</p>

<p>Could this type of information be encrypted and stored as a transaction message, and if so, is there any limit to the message length of a transaction?</p>
 12983: <p>This message exists only on blockchain.info site. It is not a part of bitcoin protocol. You should not think, that it will exists forever, because blockchain.info is  third-party-service</p>

<p>Point your view to a OP_RETURN output scripts. <a href="http://bitzuma.com/posts/op-return-and-the-future-of-bitcoin/" rel="nofollow">http://bitzuma.com/posts/op-return-and-the-future-of-bitcoin/</a></p>
