Abstract: A computer-implemented method and system for storing verifiable data. The method comprises: generating a metadata object; generating at least one claim object; generating a proof object; generating multiple identifiers, wherein each of the identifiers corresponds to the metadata object, the at least one claim object and the proof object, respectively; and generating a Merkle DAG based on the multiple identifiers, the metadata object, the at least one claim object, and the proof object, wherein the Merkle DAG is constructed by nodes which are created based on the multiple identifiers.

Abstract: The invention is to provide a driving device for interacting with a touch screen panel assembly and a method for interacting the same with a touch screen panel assembly. The touch screen panel assembly has a touch screen panel and a processor. The driving device includes a body, a trigger element, a receiving element, a controlling element and a responding element. When the driving device body is placed on the touch screen panel with its bottom side facing the touch screen panel assembly, the trigger element of the driving device will be brought into contact with the touch screen panel, sending signals to the processor to drive the touch screen panel assembly to produce corresponding acousto-optic data. The receiving element of driving device in turn receives such acousto-optic data to produce corresponding reaction, for example, audio or optical data to interact with the touch screen panel assembly.

Abstract: A singing balloon includes a balloon body, a balloon retaining body, an oscillator unit, an audio and power unit. When the balloon body is placed within an accommodating space defined by the balloon retaining body and the balloon body is allowed to be completely adhered to the oscillator unit, the music stored in the audio and power unit will be played. The balloon retaining body is formed with an abutting portion to ensure that the surface of the balloon body is completely adhered to the oscillator portion for playing music stably.

Abstract: A projector with image capturing ability is provided, which includes a portable electronic device with a detachable backlight module and a projection unit with a slot. After removing the backlight module of the portable electronic device and inserting into the slot of the projection unit, the light from a light source of the projection unit will pass through the display module and a magnification unit of the projector, and the image will be enlarged and projected on a screen so as to improve the visual quality and further to release the uncomfortableness caused by gazing at a monitor.