Electronic stamp and application method thereof

The invention discloses an electronic stamp which is used in association with an electronic communication letter. The electronic communication letter contains a communication letter state parameter. The electronic stamp has a grade, an electronic stamp application state parameter and a unique code, wherein parameter values of the electronic stamp application state parameter represent different application states of the electronic stamp; and the electronic stamp application state parameter and the communication letter state parameter of the electronic communication letter can be obtained through the unique code of the electronic stamp, and when the communication letter state parameter of the communication letter changes, the electronic stamp application state parameter of the electronic stamp can also be correspondingly changed. 本发明公开了种电子邮票，与电子通信函件关联而使用，所述电子通信函件中包含通信函件状态参数，所述电子邮票具有：等级；电子邮票使用状态参数，所述电子邮票使用状态参数的参数值表示所述电子邮票的不同的使用状态；以及唯编码，通过所述电子邮票的所述唯编码能够获得所述电子邮票使用状态参数并且获得所述电子通信函件的所述通信函件状态参数，当所述电子通信函件的所述通信函件状态参数发生改