Will the KY-100 require a cold start key?

• A. Yes
• B. No
• C. Sometimes
• D. Not applicable

Answer: (A)

The main idea here is how a cryptographic device begins operation securely. Devices like the KY-100 use a cold start key to establish a trusted starting state when they power up or reset. This key seeds the internal cryptographic state so the unit can derive the correct session and traffic keys for secure communication. Without that cold start key, the device cannot initialize in a secure, predictable way, and you wouldn’t be able to establish encrypted channels properly.

So, this device is designed around having a cold start key to boot into a usable, secure state. Once the cold start key has been loaded and the internal state is set, standard keying material can be loaded for normal operation. That’s why the correct answer is that a cold start key is required.