INTER-GROUP INFORMATION SHARING METHOD AND KEY GENERATION METHOD

摘要

PURPOSE: An information switching method between groups and public key generation method are provided to efficiently generate a public key while using a polynomial of a master node. CONSTITUTION: A master node broadcasts a group key within a group G2(110). A normal node receives a group key. The normal node generates a polynomial through the group key(120). An ID value uni-casts one of group G2(130). A node D which receives the ID value allocates the ID value for polynomial. The node D generates a share key(140).