Patent ID: 9002748
Filing Date: 2015-04-07
Classification: G06Q,H04L

Abstract:
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.