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What provisions have been made for code security?

Comprehensive automatic test methods ensure that no code exists in duplicate in any of the TROVAN UNIQUE™ transponder types, and that the codes are programmed correctly in a readable manner. In each transponder, 39 bits of memory are reserved for the code. That translates into 239 (or about 550 billion) possible unique codes. If one were to assign all 550 billion codes to Trovan ID-100 transponders with their length of 12 mm, then line these transponders up end to end, the resulting string would measure 6.5 million kilometers in length, which is about 160 times the circumference of the earth.