Another concept...

It should be possible to use multisig wallets to protect against malware.  For 
example, a user could generate a wallet with 3 keys and require a transaction 
that has been signed by 2 of those keys.  One key is placed in cold storage and 
anther sent to a third-party.

It is now possible to generate and sign transactions on the users computer and 
send this signed transaction to the third-party for the second signature.  This 
now permits the use of out of band transaction verification techniques before 
the third party signs the transaction and sends to the blockchain.

If the third-party is malicious or becomes compromised they would not have the 
ability to complete transactions as they only have one private key.  If the 
third-party disappeared, the user could use the key in cold storage to sign 
transactions and send funds to a new wallet.

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