Given it got broken up into 4000BTC chunks after the box TX, we can assume they are on paper wallets, probably distributed up using secret sharing. That's standard in the Bitcoin world.
That's the cool thing about Bitcoin. You can create a wallet on a completely offline computer or even a virtual computer, save the address and the private key, and send the money to it.
You only need the internet connection to do something with the coins.
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So much easier to crack the box holding the key.
Probably a well-crafted phone call would be as useful...
"I am the administrator of MtGox, I need you to send us a copy of your private key..."
I seriously doubt it would work for the key(s) related to that $150,000,000 transfer.
Which is why the key hopefully isn't stored on any system that is remotely accessible.
I'm not sure people are aware/scared enough of possible physical access. People have been kidnapped / banks robbed / etc for far less than $150MM.
Given it got broken up into 4000BTC chunks after the box TX, we can assume they are on paper wallets, probably distributed up using secret sharing. That's standard in the Bitcoin world.
That's the cool thing about Bitcoin. You can create a wallet on a completely offline computer or even a virtual computer, save the address and the private key, and send the money to it.
You only need the internet connection to do something with the coins.
hacking people on #bitcoin, #bitcoin-otc, etc. on freenode might or might not be a good start