Protocol downgrade on the TTLock app can expose the unlock key

A specially crafted message can be sent to the TTLock App that downgrades the encryption protocol used for communication and can be utilized to compromise the lock, such as by providing the unlockKey value. During the challenge request process, if a message is sent to the app unencrypted, and with a specific set of information, the corresponding message that contains the unlockKey value will be provided unencrypted.