Method of managing implicit certificates using a distributed public keys infrastructure

A method of managing implicit certificates of public keys for a communication network, the public keys being related to an elliptic curve cryptosystem, each implicit certificate being unable to identify a public key of a node on the network and each node being identified by an identifier, wherein:

• a first implicit certificate (γA0) of a node A is calculated by and is stored in a first indexing node (B0), the first indexing node being determined by a distributed hash table, starting from an identifier condensate obtained by hashing a first value containing the node identifier A;
• a first public key (QA0) of node A is calculated from the first implicit certificate and the public key of the first indexing node (QB0);
• a second implicit certificate (γAI) of node A is calculated by a second indexing node (BI), the second indexing node being determined by said distributed hash table from a first certificate condensate (eA0) obtained by hashing a second value containing the first implicit certificate and the node identifier A, said second implicit certificate being transmitted to the first indexing node to be stored in it;
• a second public key (QAI) of node A is calculated from the first public key (QA0) and the public key of the second indexing node (QBI).