Abstract: Method for generating cryptotokens including identifying an asset; using a secret sharing algorithm, creating a token that corresponds to the asset, wherein the token represents a private key and comprises a first half and a second half; on the client side, generating first half of public key and first half of private key; transmitting first half of public key to a server; on the server, using first half of public key to generate a second half of private key; generating second half of public key using second half of private key; associating the asset with the token; access to the asset requires the first second halves of the private key; performing a transaction with the asset by transferring first half of private key from first user to second user, and re-associating the asset from first to second user; first half of private key is never stored together with second half.

Abstract: System for cryptocurrency transactions, includes a server configured to mediate exchange of data between user devices; an internal currency derivable from any cryptocurrency; each user device configured to issue, transfer rights, redemption and restoration of an internal currency unit. Issue includes creation of new addresses in blockchain, protected by splitting the private key PrivKey into first part (PrivKey1) and second part (PrivKey2), and requires connection to the blockchain only once, to generate PrivKey and to split PrivKey into PrivKey1 and PrivKey2, based on PrivKey*G=(PrivKey1*PrivKey2)*G. PrivKey1 is generated and stored in the server, PrivKey2 is generated on the user's device. The server stores all PrivKey1's device IDs of the user's device.