| 摘要 |
<p>A key management method for encrypting a frame in an Ethernet passive optical network (EPON) is provided. In the method, secure parameters including secure keys and their association numbers which are used in the present or will be used in the next by each secure channel are managed by composing a key information table. Then, it determines whether an association number of a received encryption frame is valid or not with reference to the key information table if the encryption frame of which association number has been changed is received. A secure key changes if the association number is determined to be valid, and the secure key does not change if the association number is not valid.</p> |
