> If they lost the keys(as in, lost the wallet.dat with the keys in it) and were able to generate a valid private key given only a public bitcoin address... bit

> If they lost the keys(as in, lost the wallet.dat with the keys in it) and were able to generate a valid private key given only a public bitcoin address... bitcoin is dead, game over, pack it up. This is a realistic scenario. If the private key generation was of the same quality as the rest of their code (i.e. using a weak PRNG), the reconstructing a private key may be doable. It's not like Bitcoin wallets weren't previously cracked using this method in the case of an Android wallet misusing the crypto API (http://arstechnica.com/security/2013/08/google-confirms-critical-android-crypto-flaw-used-in-5700-bitcoin-heist/ http://arstechnica.com/security/2013/08/google-confirms-crit...) A competent entity in possession of MtGox source code may be in a good position to steal all the loot.