My second question is related to bitcoin
From wikipedia:
In December 2010, a group calling itself fail0verflow announced recovery of the ECDSA private key used by Sony to sign software for the PlayStation 3 game console. However, this attack can be considered invalid against ECDSA because it is Sony who failed to implement valid signature(s). That is, the attack was made possible because Sony failed to generate a new random k for each signature.
I suppose bitcoin is not vulnerable to this attack? When I try to sign a transaction for multiple times, I find that the signatures are different. Is it related to this vulnerability?
Not sure if this is what you mean, meant but Sony vulnerability came from them using the same "random" number every time they signed anything.
