Abstract: A method of sending streamed data over an IP network from a first node 1 to a second node 4, the method comprising using Internet Key Exchange (IKE) to establish an IKE security association (SA) between the first and second nodes 1,4. A shared secret is established between the first and second nodes using the IKE SA, and the streamed data encrypted at the first node 1 with a cipher using the shared secret or a key derived using the shared secret. IP datagrams are constructed containing in their payload, segments of the encrypted streamed data, the datagrams not including an IPSec header or headers. The IP datagrams are then sent from the first node 1 to the second node 4.

Abstract: A network device for implementing IPSec and comprising at least one IP forwarder (IPFW) arranged to receive IP packets each of which is associated with a Security Association (SA). The IP forwarder(s) determines the destinations of the packets, and forwards the packets to their destinations. A plurality of security procedure modules (SecProcs) are coupled to the IP forwarder(s) and are arranged to implement security procedures for received IP packets in parallel. A security controller (SC) is arranged to allocate negotiated SAs amongst the security procedure modules and to notify the security procedure modules and the IP forwarder(s) of the allocation, whereby the IP forwarder(s) can send IP packets to the security procedure module implementing the associated SA.

Abstract: For joining two cables which have an insulation of a cross-linked linear polymer such as polyethylene, the insulation on each of the two ends to be connected is tapered, the ends of the conductors are then secured to each other, and the joint is wrapped with a tape of the same linear polymer containing a cross-linking agent. The wrapping is enclosed in a tube of relatively rigid material, which is then enclosed in a tube of flexible material. The joint is then enclosed in a casing and simultaneously subjected to heating by an electric heating arrangement and to all-sided pressure exerted by a fluid, which may be a gas or a liquid such as silicone oil.