Bitcoin is great, but it misses one thing that usual bank transfers have: payment title.
Perhaps it should be possible to include short (<=512 bytes) message for each transaction.
The message could be encrypted with public/private keys so only the receiver can see its contents.
What do You think ?
I might be wrong, but the messages could also be used to increase randomness of hashing process by the way, couldn’t they ? If not, never mind.
ECDSA can’t encrypt messages, only sign signatures.
It would be unwise to have permanently recorded plaintext messages for everyone to see. It would be an accident waiting to happen.
If there’s going to be a message system, it should be a separate system parallel to the bitcoin network. Messages should not be recorded in the block chain. The messages could be signed with the bitcoin address keypairs to prove who they’re from.
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