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: The present invention provides a storage container with insulation effect, for long-term storage of fresh foods and drinks, said container having a storage space, characterized in that: the storage space includes a supporting frame with a positioning space formed therein and an insulation device provided inside the positioning space; said supporting frame comprising a plurality of longitudinal poles, transverse poles, vertical poles, and branch joints for forming the positioning space; said insulation device comprising at least one sheet-shaped bag and one positioning unit arranged corresponding to the sheet-shaped bag, the sheet-shaped bag configured to hold liquid, the positioning unit configured to fix the sheet-shaped bag on a corresponding side face of the positioning space to avoid movement; the sheet-shaped bag having a flow passage disposed therein for holding the liquid, and flow passages having a one-way valve arranged at one end thereof, which can be used with an injection device for control of the

Abstract: The present invention provides a storage container with insulation effect, for long-term storage of fresh foods and drinks, said container having a storage space, characterized in that: the storage space includes a supporting frame with a positioning space formed therein and an insulation device provided inside the positioning space; said supporting frame comprising a plurality of longitudinal poles, transverse poles, vertical poles, and branch joints for forming the positioning space; said insulation device comprising at least one sheet-shaped bag and one positioning unit arranged corresponding to the sheet-shaped bag, the sheet-shaped bag configured to hold liquid, the positioning unit configured to fix the sheet-shaped bag on a corresponding side face of the positioning space to avoid movement; the sheet-shaped bag having a flow passage disposed therein for holding the liquid, and flow passages having a one-way valve arranged at one end thereof, which can be used with an injection device for control of the

Abstract: The present invention is to provide a vacuum hanger bag having a bag with an airtight closure, a one-way valve installed to the bag, and a hook disposed on the top end of the bag. The hook secured to an outer side of the bag, it consists of a hook with a jut projected downward from its bottom end to penetrate into an inner side of the bag. A base secured to the inner side of the bag with an axial hole for said jut embedding into. An impervious stopper is hidden from view retained at a bottom end of the axial hole. A nut is threaded to a bottom end of the base. And a hook ring with a jut projected upward from its top end is embedded into the nut.