CPC H04L 9/0861 (2013.01) [G06Q 20/3825 (2013.01); G06Q 20/3829 (2013.01); H04L 9/0618 (2013.01); H04L 9/0825 (2013.01); H04L 9/0894 (2013.01); G06Q 20/363 (2013.01); G06Q 20/3674 (2013.01)] | 18 Claims |
1. A method of generating a hierarchical deterministic keys portfolio containing private keys according to a tree structure to sign transactions sent to a blockchain, said method comprising:
creating, during an initialization phase, an administrator account;
protecting, during the initialization phase, access to the administrator account by an administrator authentication element;
generating, during the initialization phase, a master private key (km) by hashing a random seed, the master private key being stored in a secure memory area of a mobile device;
creating, during a parameter setting phase, a plurality of usage context identifiers from the administrator account, each usage context identifier pointing to an address in the secure memory area in which conditions for use of a private key in said context are stored;
creating, during the parameter setting phase, a plurality of user accounts from the administrator account, each user account being associated with a private key in the tree structure, each user account being identified by an identifier and access to each user account being protected by a user authentication element, the private key of a corresponding user being obtained from the master private key, the usage context identifier to which the user account is attached, and an identifier of the user;
hashing the identifier and using the hashed identifier to deduce at least one index; and
using the at least one index to generate the private key of the user.
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