Abstract: The present disclosure relates to a method for secure, traceable and privacy-preserving with anonymity revocation digital currency transfer to at least a first user from a second user among a plurality of banked and unbanked users by using a distributed ledger comprising a plurality of ledger nodes, wherein said users perform Digital Currency transfers by adding transactions on this ledger using user devices configured to be connected to said nodes, to a registration authority and to a revocation authority, said authorities owning each one a public/private key pair, comprising: an enrollment phase, performed by a user device of said first user, comprising: sending to the registration authority evidence of the first user's identity, generating a first user identification key pair comprising a first user identification public key and a first user identification secret key, sending to the registration authority said generated first user identification public key, receiving from the registration authority a si

Abstract: A method for anonymously identifying a security module by a server. The method includes: receiving, from the module, a request for the address of a server managing subscription data of an operator, the request including a current identification value of the module, which depends on an identifier of the module and a current date; searching for the current identification value in at least one set of identification values, the set being associated with an operator and including, for a given module, a plurality of identification values, which are calculated depending on the identifier of the module and a date, the date varying for the plurality of identification values of the set between a start date and an end date; and sending, to the security module, the address of the server managing subscription data associated with the operator when the current identification value appears in the set of identification values.

Abstract: Secure data and cryptographic key sharing on a ledger distributed on a network between a plurality of network connected devices called entities.

Abstract: A method for anonymously identifying a security module by a server. The method includes: receiving, from the module, a request for the address of a server managing subscription data of an operator, the request including a current identification value of the module, which depends on an identifier of the module and a current date; searching for the current identification value in at least one set of identification values, the set being associated with an operator and including, for a given module, a plurality of identification values, which are calculated depending on the identifier of the module and a date, the date varying for the plurality of identification values of the set between a start date and an end date; and sending, to the security module, the address of the server managing subscription data associated with the operator when the current identification value appears in the set of identification values.