Japan Drivers License

Based >Extensible Algorithm Framework

The Japan Drivers License algorithm is a built-in instance of the Checkdigit framework.

This algorithm masks input in the standard format of Japanese Drivers License numbers.

The characteristics of the input numbers are:

• 12 digits long

• checkdigit as the second to last (11th) digit

• checkdigit calculated using the IBM MOD11 formula against the first ten digits

• no non-numeric characters

The algorithm instance will take an input of valid Japanese Driver License numbers and return valid masked equivalent with new digits including a valid calculated checkdigit. The first ten digits are masked, and then a new checkdigit is derived from them and replaces the original one. The last digit which represents the number of times a license has been issued is preserved.

Input that does not meet the expected format will masked using a fallback instance of the CM Alpha-Numeric algorithm.

Examples:

Valid input:

• “282983010691“ → "155261998521"

• "156642855303" → "897346134533"

Invalid Input:

 

• “111-222-333“ → “895-912-671“

• "1234567890abcdefghij" → "1244102233iquxbsahjx"

• null → null

• ““ → ““