External commands: ( assuming RSA as MODEX cryptosystem)

By changing values on control pins following algorithms can be activated by user

• Initialise commands
• Commands for key exchange
  • RSA key exchange commands
  • IDEA key exchange commands
• Commands for RSA keypair updating
• commands for IDEA key updating
• commands for IDEA en/decryption
• commands for adding new trusted users
• Miscancellous