公开(公告)号：US07814068B2

公开(公告)日：2010-10-12

申请号：US09987828

申请日：2001-11-16

申请人： Omid McDonald ,  Philip Painter ,  David McDonald

发明人： Omid McDonald ,  Philip Painter ,  David McDonald

IPC分类号： G06F17/00

CPC分类号： H04M1/274516 ,  H04M1/72519

摘要： A method and system for detecting change to a record in a file stored on an electronic token involves storing a change detection code (CDC) so that a change detection applet can calculate a current CDC for corresponding record(s), and compare the current CDC with the stored CDC to determine if data has changed. Any changes to records are registered by a registering element that provides a service feature, back-up of the file and/or synchronizes the file with other files stored remotely. One use of the method is to back-up phonebook records on USIM/SIM cards.

摘要翻译： 用于检测对存储在电子令牌上的文件中的记录的改变的方法和系统涉及存储改变检测码（CDC），使得改变检测小程序可以计算相应记录的当前CDC，并且比较当前CDC 与存储的CDC确定数据是否已更改。 记录的任何更改由提供服务功能，文件备份和/或与远程存储的其他文件同步的注册元素注册。 该方法的一个用途是在USIM / SIM卡上备份电话簿记录。