Abstract: A pouch-shaped secondary battery includes a case configured to have a laminate sheet structure, an electrode assembly received in the case, an electrode tab extending from the electrode assembly, an electrode lead having one side connected to the electrode tab and the other side protruding out of the case, and a protective film located on an upper surface and a lower surface of a weld of the electrode tab and the electrode lead. The protective film includes an ethylene-vinyl acetate copolymer (EVA)-based adhesive layer disposed in tight contact with the surface of the weld and a support layer located on one surface of the adhesive layer, the support layer being made of at least one of polypropylene (PP), cast polypropylene (CPP), or polyethylene terephthalate (PET). A method of manufacturing the pouch-shaped secondary battery is also provided.

Abstract: Disclosed is a communication apparatus including a synchronization signal detector configured to detect a synchronization signal received from other communication apparatus coupled to the communication apparatus, wherein the other communication apparatus sends a quantum signal generated by a first light source to the communication apparatus, and a second light source configured to generate a decoy signal to be added to a quantum signal that is to be sent to the other communication apparatus according to a result of the detection of the synchronization signal.

Abstract: Disclosed is a communication apparatus including a synchronization signal detector configured to detect a synchronization signal received from other communication apparatus coupled to the communication apparatus, wherein the other communication apparatus sends a quantum signal generated by a first light source to the communication apparatus, and a second light source configured to generate a decoy signal to be added to a quantum signal that is to be sent to the other communication apparatus according to a result of the detection of the synchronization signal.