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In the context of ubiquitous ID technology, the unique identifiers assigned to distinguish objects are called ubiquitous IDs, or ucodes. These ucodes are given to a spectrum of objects that make up the ubiquitous computing environment, and they enable the objects to be recognized automatically. The ucodes are conveyed by means of devices called ucode tags, which the Ubiquitous ID Center deals with in different forms: barcodes, RFID tags, smart cards, active chips, and so on. The center classifies tags as follows from the point of view of interface category and security class, and has established different certification standards in each class for standard ID tags. Tags meeting these criteria are certified by the center as standard ID tags.
[ucode Interface Category]
| Category |
Contents |
| Category 0 |
Print tags (Barcode, two-dimensional barcorde) |
| Category 1 |
RF tags (RFID with a contactless interface and a contactless IC card) |
| Category 2 |
Active RF tags (RFID tags and sensor nodes that have batteries and communicate using RF) |
| Category 3 |
Active Infrared tags (ID tags and sensor nodes that have batteries and communicate using infrared rays) |
[ucode Security Class]
| Class |
Provided security-related features |
| Class 0 |
Data defect detection |
| Class 1 |
Physically duplication resistant/Physically forgery resistant |
| Class 2 |
Identification prevention |
| Class 3 |
Tamper resistant (physically, logically), access management by resource |
| Class 4 |
Secure communications with unknown nodes |
| Class 5 |
Time-dependent resource management |
| Class 6 |
Internal program/security information update |
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