CRYPTOGRAPHY AND KEY MANAGEMENT DEVICE AND ARCHITECTURE

A method for operating a secure device having a plurality of mutually exclusive circuit zones, including a first circuit zone having a first level of security and a second circuit zone having a second level of security less than the first level of security, the method including unpacking a key exchange package including receiving a key exchange package in the second circuit zone, the key exchange package including encrypted key data and processing the encrypted key data using a content key in the first circuit zone to generate decrypted key data and storing the decrypted key data in the first circuit zone without disclosing the decrypted key data into the second circuit zone.