Abstract: In a file sharing system, a key manager unit realizes a correspondence between the first user identifier and the first public key in response to a registration request of the first user, generates a first key material for encrypting the first file into a first encrypted file, and generates a first credential according to the first user identifier, the first file identifier, the first public key and the first key material after receiving an access-right claim request to the first file from the first user. A file storage unit stores the first encrypted file and the first credential. The first user uses the first user identifier, the first file identifier and the first private key to retrieve the first key material out of the first credential, and uses the first key material to decrypt the first encrypted file into the first file.

Abstract: A sport guiding device and a sport guiding method using the same are provided. The sport guiding method includes the following steps. Two of a predetermined sport frequency intensity, a predetermined calorific capacity and a predetermined sport time are provided. A predetermined sport frequency curve is obtained according to two of the predetermined sport frequency intensity, the predetermined calorific capacity and the predetermined sport time. An actual sport frequency curve of a user is detected. If the actual sport frequency curve is deviated from the predetermined sport frequency curve for the predetermined level, then a tempo guiding signal is outputted.

Abstract: A computerized health management method and a health management electronic device are provided. The computerized health management method includes the following steps. A blood pressure curve of a user is measured. A systolic pressure and a diastolic pressure of the blood pressure curve are calculated by a microprocessor. A high blood pressure risk level of the user is analyzed by the microprocessor according to the systolic pressure and the diastolic pressure. A cardiovascular disease risk level of the user is analyzed by the microprocessor according to the high blood pressure risk level. A measuring frequency for measuring the blood pressure is suggested to the user by the microprocessor according to the high blood pressure risk level or the cardiovascular disease risk level.

Abstract: A sport guiding device and a sport guiding method using the same are provided. The sport guiding method includes the following steps. Two of a predetermined sport frequency intensity, a predetermined calorific capacity and a predetermined sport time are provided. A predetermined sport frequency curve is obtained according to two of the predetermined sport frequency intensity, the predetermined calorific capacity and the predetermined sport time. An actual sport frequency curve of a user is detected. If the actual sport frequency curve is deviated from the predetermined sport frequency curve for the predetermined level, then a tempo guiding signal is outputted.