Security network controller

A data security device, comprising:

• a data input/output control circuit configured to couple with a first central processing unit (CPU) and a memory via a first bus;
• a cryptographic processing circuit coupled to the data input/output control circuit via a second bus, the second bus dedicated to data transfer between the data input/output control circuit and the cryptographic processing circuit, the cryptographic processing circuit to provide encryption and decryption processing;
• and
• an authentication processing circuit coupled to the data input/output control circuit via a third bus, the third bus dedicated to data transfer between the data input/output control circuit and the authentication processing circuit, the authentication processing circuit configured to generate authentication data,
• wherein data input/output control circuit is configured to transfer first data between the data input/output control circuit and the memory via the first bus without using the first CPU, transfer second data to and from the cryptographic processing circuit via the second bus, and transfer third data to and from the authentication processing circuit via the third bus.

A method of a data security device comprising:

• using a direct memory access controller, transferring first data from a memory to an input/output control circuit via a first bus;
• transferring the first data from the input/output control circuit to an authentication processing circuit via a second bus, without using the first bus;
• using the authentication processing circuit, generating authentication data based on the first data;
• transferring the first data from the input/output control circuit to a cryptography processing circuit via a third bus, without using the first bus;
• responsive to authentication of the first data by a first central processing unit (CPU) coupled to the first bus, using the cryptography processing circuit, decrypting the first data;
• and
• using the direct memory access controller, transferring the decrypted first data from the input/output control circuit to the memory via the first bus.