That's something you'll never have to do. In fact you shouldn't do that. The money will be passed to next of kin like other property. Whereas if the family member transfered the money out it would be treated more like fraud.
I don't usually see people considering the possibility that P = NP but it is a large polynomial conversion. If it's x64 or something then a 256 bit AES key would baloon to 2(8*64) = 2^(512) which is still massive.
That's something you'll never have to do. In fact you shouldn't do that. The money will be passed to next of kin like other property. Whereas if the family member transfered the money out it would be treated more like fraud.