user84880: it seems like the scripting language could allow multiple private keys to spend a coin?
what if i send a coin to someone, but also allow it to be spendable by me. would their wallet still show they received the $?

user51948: Depends on the wallet. To recognise the transaction at all, their wallet would have to have the script / multisig address in it too. They'd have to have done that themselves, you can't generally trick someone because their wallet simply wouldn't see the transaction at all.

84880: <p>it seems like the scripting language could allow multiple private keys to spend a coin?</p>

<p>what if i send a coin to someone, but also allow it to be spendable by me. would their wallet still show they received the $?</p>
 51948: <p>Depends on the wallet. To recognise the transaction at all, their wallet would have to have the script / multisig address in it too. They'd have to have done that themselves, you can't generally trick someone because their wallet simply wouldn't see the transaction at all.</p>
