| 摘要 |
PROBLEM TO BE SOLVED: To provide an inexpensive card key and a locking device while making it difficult to create a duplicate key. SOLUTION: An optical fiber cable 2 holding a plurality of optical fibers at random is embedded in the card key 1. The plurality of optical fibers 3 are densely fixed to the incident end side of the optical fiber cable 2, and the optical fibers 3 are arranged randomly at spaces in a filler on the outgoing end side. A peculiar optical pattern is generated when light is transmitted through the optical fiber cable. The optical pattern of the optical fiber cable of the card key is stored in a nonvolatile memory 18. The optical pattern of the optical fiber cable 2 of the mounted card key 1 is detected by a CCD imaging element 15 and compared with the optical pattern of the optical fiber cable of the card key read from the nonvolatile memory 18. When both are coincident, locking or unlocking is performed. COPYRIGHT: (C)2006,JPO&NCIPI
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