On the base of this architecture, key techniques to realize E - Postage system are studied, which include the design of postage - storage and stamp ^ secure postage renewing transaction and the foundation of secure background system. 在此基础上,重点研究了邮资存储盒设计、邮资续费、防伪邮资凭证设计和系统后台安全体系等实现电子邮资系统的关键技术。