Apparatus and method for generating a key for broadcast encryption
AssigneeSamsung Electronics Co., Ltd.
InventorsHwan-joon Kim, Dae-youb Kim, Weon-il Jin, Sung-joon Park
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Abstract
An apparatus and method for generating a key for a broadcast encryption. The apparatus includes a node secret generator for managing a user that receives broadcast data in a tree structure and for generating a unique node secret for each node in the tree structure. The apparatus also includes an instant key generator for temporarily generating an instant key used at all nodes in common in the tree structure, and a node key generator for generating a node key for each node by operating the node secret generated at the node secret generator and the instant key generated at the instant key generator. Thus, key update can be efficiently achieved.
Claims14
An apparatus for generating a key for a broadcast encryption, comprising:
- a node secret generator for managing a user that receives broadcast data in a tree structure and for generating a unique node secret for each node in the tree structure;
- an instant key generator for temporarily generating an instant key used at all nodes in common in the tree structure;
- and
- a node key generator for generating a node key for each node by operating the node secret generated at the node secret generator and the instant key generated at the instant key generator.
A method for generating a key for a broadcast encryption, comprising the steps of:
- managing a user that receives broadcast data in a tree structure and generating a unique node secret for each node in the tree structure;
- temporarily generating an instant key used at all nodes in common in the tree structure;
- and
- generating a node key for each node by operating the node secret and the instant key.
Dependencies are inferred from the claim text.