3 ms·

uh? you can sign the message to prove your identity

• nullc 13y ago
  Maybe you can, not always. Did you issue the payment from your account a service? Did you issue it from a hardware wallet? Did you, by chance, happen to decide that you want to use an anonymization tool when buying your exploit? Perhaps, you have a strict retention policy and destroy keys which are no longer used and can't sign for it anymore…
  • pera 13y ago
    If you are paying 20btc for a zero day exploit I suppose you know what you are doing. Either way everything you had mentioned are not deficiencies of Bitcoin per se.