Date Added: Apr 2012
To speed up the forwarding characteristics of routers Internet Engineering Task Force (IETF) developed Multiprotocol Label Switching or MPLS technology .This technology is very much efficient than usual IP routing as it uses a label switching technique. For security purpose there are various encryption algorithms like symmetric (AES, DES, Triple DES, blowfish, CAST,RC5) or asymmetric(Diffie-Hellman) etc, various protocols and many more techniques have been developed so far to secure any technology. This paper presents a survey on such various security techniques, protocols analyzed in MPLS network and security based on symmetric cryptographic algorithms in detail. In MPLS network symmetric encryption algorithm has been analyzed for different bit level.