If the signature is valid, and the person examining the certificate trusts the signer, then they know they can use that key to communicate securely with its owner.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request. ### Instruction: List the MITRE techniques contained in the text. ### Input: If the signature is valid, and the person examining the certificate trusts the signer, then they know they can use that key to communicate securely with its owner. ### Response: T1608.003.