Security device, electronic device, secure boot management system, method for generating boot image, and method for executing boot chain

An electronic device comprising:

• a storage device configured to store a boot image including a protected boot key and a protected execution image;
• and
• a security device configured to store a root key and perform a boot operation to execute the boot image using the root key,
• wherein the security device is configured to:
• generate a derived key according to a predetermined key protection method using the root key and the protected boot key,
• perform verification according to the predetermined key protection method using the generated derived key to extract a boot key from the protected boot key, and
• perform the boot operation using the extracted boot key.

A secure boot management system comprising:

• a key deriver configured to receive a root key and a key protection method and generate a derived key according to the received key protection method;
• a key protector configured to perform a protection operation on a boot key according to the key protection method using the generated derived key, to generate a protected boot key;
• and
• a boot image generation system configured to perform a protection operation on an execution image using the boot key, and generate a boot image including the protected boot key and the protected execution image.