Abstract: The present invention relates to a security document comprising at least an antenna and a chip connected to the antenna. The security document is characterised in that it further comprises at least one transparent window arranged such that at least a part of said antenna is visible in said window thereby forming a visible security feature.

Abstract: A magnetic alligator clip is described. The alligator clip comprising, a pair of conductive gripping jaws attached to each other, biasing means for biasing a first end of the conductive gripping jaws towards each other, and a magnet disposed at the first end of one of the conductive gripping jaws. Also described is an electrical lead having at least one wire, each of the wires having a magnetic alligator clip electrically connected at each end. An extension for the magnetic alligator clip is also described.

Abstract: A magnetic alligator clip is described. The alligator clip comprising, a pair of conductive gripping jaws attached to each other, biasing means for biasing a first end of the conductive gripping jaws towards each other, and a magnet disposed at the first end of one of the conductive gripping jaws. Also described is an electrical lead having at least one wire, each of the wires having a magnetic alligator clip electrically connected at each end. An extension for the magnetic alligator clip is also described.

Abstract: The present invention relates to a self-authenticated tag generation method and interpretation method used in the self-authenticated key system, which comprises the following steps: inputting data by the publisher; generating tag via a self-authenticated tag device by the publisher; transmitting generated tag to the receiver; interpreting tag via the self-authenticated tag device by the receiver; and displaying data. The present invention is easy and safe, the generated self-authenticated tag can be transmitted by various carriers, can distinguish the object and upload abundant information without easily tampered. Moreover, the acquisition of the public key is not achieved by the third party, which decreases wasting the network resources, and avoids the unsecure factors brought by the third party.

Abstract: A method of generating multi-dimensional key comprises both generating three-dimensional coordinate sequences and generating public key and private key, wherein generating three-dimensional coordinate sequences is: setting the base of three-dimensional key as M comprising of m×l×h key elements, each layer in a three-dimensional matrix being a two dimension matrix sized m×l along Z axis, wherein, m is the number of rows in each layer of Mk, l is the number of columns in each layer of Mk, k=1, . . . , h; the public key and private key are generated in a manner consistent with the generation of the three-dimensional coordinate sequences. In the present invention, the coordinates of a matrix are picked up by ID-coordinates transformation under the condition of a multi-dimensional matrix, which employs the method of hierarchical processing.

Abstract: A self-authenticated method with timestamp consists of key generating process and self-authenticated process between sender and receiver.