Fun with numbers

6 July 2004

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Table of Contents

Fun with numbers


UIN/FIN structure

UIN/FIN algorithm

IP Analysis: Can the government really prohibit unauthorised use ?

Modulo 11 checksum

Reverse Engineering the FIN algorithm

21st century UINs - T & G prefix

Virtual Experiment: Verifying UIN/FIN check digits

21st century UIN/FIN check digit

Universal UIN/FIN Check Digit Algorithm


Points to Ponder

Author: Ngiam Shih Tung


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Other interesting stuff:

Singapore vehicle registration number algorithm