the international level, Cert-IST is a member of FIRST (Forum for Incident Response and Security Teams). Cert-IST can thus relies on a mondial network of more than 170 CERT affiliated to FIRST, which gives access to a worldwide unique alert system by providing necessary contact points for trans-frontier incidents and by offering a privileged access to information not yet public. Cert-IST has been selected as local organizer for June 2001 13th FIRST Conference.

At the european level, Cert-IST participate to the TF-CSIRT which promote the collaboration between Computer Security Incident Response Teams (CSIRTs) in Europe. Furthermore, the Cert-IST was the coordinator of the EISPP project ("European Information Security Promotion Programme") of the european community. This projet aims at developing a european network of CERT and at providing SME/SMI with security services.

At the French level, Cert-IST keeps up, under the control of French SSI organisations (SGDN and DCSSI), close relations with its 2 homologues, CERT-RENATER (dedicated to research and education community), and CERTA (dedicated to the administration sector).