Servizio Informazioni Militare

The Italian Military Intelligence Service (Servizio Informazioni Militare, or SIM) (from 1900 to 1949) was the military intelligence organization for the Royal Army (Regio Esercito ) of the Kingdom of Italy (Regno d'Italia) from 1900 until 1946, and of the Italian Republic until 1949. SIM was Fascist dictator Benito Mussolini's equivalent to the German Abwehr.

SIM had a large, well-organized cryptologic group, Section 5 (Sezione 5). Section 5 produced codes and ciphers for the Royal Army and higher level enciphered codes for the Royal Navy.