| 摘要 |
<p>PURPOSE: A transmission method for authentication and privacy security in a tree-structured network is provided to present an encryption mechanism to secure a secrete in a network having a point-to-multipoint tree structure. CONSTITUTION: An Ethernet frame format to execute an encryption function is composed of a PA(Preamble) field(400), a DA(Destination Address) field(402), an SA(Source Address) field(404), an L(Length)/type field(406), an LLID tag field(408), an Enc(Encryption) tag field(410), a PDU(Packet Data Unit) field(412), an IC(Integrity Check) field(414), and an FCS(Frame Check Sequence) field(416). The LLID means an identifier for each entity in authentication or key allocation. The Enc tag field(410) indicates whether a frame is encrypted. The Enc tag field(410), containing the data of a block(420), consists of an Enc tag type field and an Enc tag information field. The Enc tag information field has information necessary for encryption/decoding, such as key synchronization, a version, an IV(Initialization Vector), etc. The IC field(414) exists for the integrity check of a message contained in the PDU field(412). The FCS field(416) is used to check whether an error exists between a link and an MAC layer.</p> |
