IEC 62481-3:2013(E) specifies the DLNA link protection guidelines, which are an extension of the DLNA guidelines. DLNA link protection is defined as the protection of a content stream between two devices on a DLNA network from illegitimate observation or interception using the protocols defined within this part of IEC 62481. It references existing technologies for Link Protection and provide mechanisms for interoperability between different implementations as well as integration with the DLNA architecture. This second edition cancels and replaces the first edition published in 2010 and constitutes a technical revision. It includes the following changes: - includes variable play (trick mode) support; - includes updates to resolve interoperability issues.