| 摘要 |
<p>In a postage meter system, a user enters information indicative of a batch of mail pieces to be franked (30). The mail pieces are franked (31), and when the batch is completed, data relating to the batch are made the subject of a cryptographic engine (33). The data are digitally signed, or a message authentication code (MAC) is derived, all in a postal security device (PSD) (32). The data are communicated (34), preferably by means of public-key cryptographic (35). These data are then made available to the postal authority in a secure way (36).</p> |
