Patent ID: 7136998
Filing Date: 2006-11-14
Classification: H04L

Abstract:
1. A transmitting apparatus for transmitting a layer structure of a directory which manages public key certificate information in a layer manner, comprising: managing means for making certificate authority information correspond to a container entry which can store its own subordinate information, making end entity information correspond to a leaf entry which is under domination of said container entry and cannot store its own subordinate information, and managing a layer structure of a directory constructed by said container entry and said leaf entry; first detecting means for selectively detecting a change of said layer structure of said directory which is managed by said managing means as a function of a predetermined mask and obtaining first differential information constructed by a difference of the change of the layer structure of said directory; second detecting means for detecting a change of said end entity information of said leaf entry which is managed by said managing means and obtaining second differential information constructed by a difference of the change of end entity information of said leaf entry; and broadcasting means for broadcasting said first differential information detected by said first detecting means and said second differential information detected by said second detecting means, wherein information which can obtain latest public key certificate information and lapse information of said latest public key certificate information are stored into said container entry and/or said leaf entry at a predetermined time interval, and wherein said lapse information includes a method of obtaining said latest public key certificate information.