On 3 February 2025, Europol informed the public that it has expanded its Secure Information Exchange Network Application (SIENA) from 3000 to 3500 connections. SIENA enables the secure, efficient, and timely exchange of information between Europol and its partners, including national, regional, and local law enforcement authorities as well as customs officials, border guards, and other specialised police forces.

Under the Directive 2023/977 on the exchange of information between the law enforcement authorities of the EU Member States, which took effect at the beginning of the year, SIENA has also become the “default channel” for cooperation between European law enforcement authorities: SIENA is used by the authorities to send requests for information, to provide information pursuant to such requests, and to provide information on their own initiative.