It would use publickeycryptography to generate and store thousands of public and private key pairs, one for every app or gadget the user needs to unlock.
The emulator for first generation games can be updated via an official Microsoft download burned to CD by the user, though the CDs' content will be encrypted and signed with publickeycryptography.
Leveraging the breakthroughs of public-key cryptography, bitcoin also uses peer-to-peer networking to operate without a central authority whereby the new issuance and transaction verification functions are carried out collectively by the network.
Research conducted by Adi Shamir, one of the pioneers of the RSA algorithm for public-key cryptography which forms the basis of online security today indicates that bitcoin markets indicated that all the large bitcoin transactions over the past few years seem to have the same originating source, related to a single large transaction that took place in November 2010.