Lightweight dual access control system in medical treatment Internet of Things

The invention relates to a lightweight dual access control system in a medical treatment Internet of Things. A patient obtains medical service via a medical infrastructure provider, the medical treatment Internet of Things is responsible for collecting physiological data and a medical image of the patient to form a medical document, and the patient specifies an access strategy to encrypt the medical document and sends the medical document to a cloud platform through the Internet; the patient generates an emergency access key based on a password by a key generation center and specifies an emergency contact to know the password; the user registers via the key generation center, obtains an attribute key and generates a corresponding authorization key according to an access strategy matching condition, and the authorization key has corresponding partial decryption authority on the medical document encrypted by the cloud platform; the emergency contact interacts with the cloud platform andthe medical infrastructur