Method for securing IP connections for network operator combinatory connections

摘要

The invention relates to a method for securing IP connections with a combinatory connection of a communication network of a first network operator with a communication network of at least one second network operator using the Session Initiation Protocol, SIP. This method is based on the fact that portions of an SIP message, but at least the information necessary for the combinatory connection of the networks, is transmitted in encrypted form between a transmission channel of the first network operator and a reception channel of the second network operator.

主权项

1. A method for securing internet protocol (IP) connections for the interconnection of a communication network of a first network operator with a communication network of at least one second network operator by using the Session Initiation Protocol (SIP), comprising: transmitting in encrypted form between the transmission server of the first network operator and the reception server of the second network operator at least parts of a SIP message having information needed for the billing of the connection thereby identifying and authenticating the transmission server and the reception server involved in the internet protocol connection, and encrypting only the parts of the message headers of the SIP message which are not used for routing and which are not mandatory; if the SIP message is a Request and is already encrypted by a mechanism that has an unsuitable protocol, then additionally encrypting one part of the message headers that is not already encrypted by such unsuitable protocol.