Security reinforcement method for transporting key information in packet transport network

Abstract

The invention discloses a security reinforcement method for transporting key information in a packet transport network. The method comprises the following steps of 1, determining different transporting paths in information sending and receiving directions; 2, appointing key information interleaving, interweaving and encryption modes by receiving nodes; 3, packaging data to form N data packets and carrying out interleaving to form n new data packets; 4, establishing network connection by sending and receiving nodes; 5, adding MPLS (Multi-Protocol Label Switching) labels and sequence numbers to new data packets; 6, carrying out interweaving and encryption; 7, transporting processed data packets by the sending nodes according to the path of the sending direction; and 8, carrying out decryption, de-interleaving and de-interleaving by the receiving node, thereby restoring the key information data packets. According to the method, through data interleaving, one data packet no longer orderly contains complete data segments and the information contained in the data packets are disordered, even if a transmission link is eavesdropped and the data packets are intercepted, the data is not leaked; and the physical paths of the sending and receiving directions are different, so the security and confidentiality of transmitting the key information in the packet transport network are effectively reinforced.

Description

technical field [0001] The invention relates to the field of communication, in particular to a safety reinforcement method for transmitting key information in a packet transmission network suitable for MPLS-TP. Background technique [0002] MPLS is Multi-Protocol Label Switching, which is the abbreviation of English Multi-Protocol Label Switching, and TP is the transmission protocol, which is the abbreviation of English Transport Profile. Packet transport network based on MPLS-TP technology, that is, PTN (Packet Transport Network) network is the current mainstream technology adapting to IP-based communication services and packet-based networks. IETF / ITU-T is responsible for the formulation of relevant standards. MPLS-TP technology simplifies and transforms Multi-Protocol Label Switching and Pseudowire (MPLS / PW) technologies, and introduces concepts such as transport network layering, OAM, and linear protection to meet the needs of transport networks. As a connection-oriente...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the hidden danger of leaking secrets existing in the process of transmitting the key information of important users in the existing MPLS-TP-based packet transport network PTN, and to design a security reinforcement method for transmitting key information in the packet transport network. The means of security and confidentiality include interleaving, interleaving and encryption technology at the logical level to recombine the data packets before sending them, as well as adopting different transmission paths for sending and receiving at the physical level, which increases the difficulty of information interception and improves the reliability of transmitting key information based on the PTN network. Security and Confidentiality

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