Today's armed forces use highly advanced digital encryption technologies to protect their communications. The days of rotating rotors are gone; instead, strong mathematical algorithms like AES (Advanced Encryption Standard) or RSA are used.

These algorithms rely on complex calculations, long keys, and the use of crypto devices that may be software or hardware based. A key advantage is the possibility of end-to-end encryption even over unsecured networks. Military communication devices also feature strict access controls and regular key changes.

Constant progress in cryptography makes it nearly impossible for enemy interceptors to decrypt secret messages in useful time.