The Luhn algorithm

[joh]

Hi,

Can anyone help me how to create a java service to add a checksum using Luhn algorithm?
I want to add 2 digit checksum to my number.

example: 006244914 → 00624491411

I dont want to do this as a flow service.

/J

[Tong_Wang]

check this post:

How do I implement the Luhn algorithm?

[joh]

I don’t think this is what I need. I like to add a checksum of 2 digits to my number using modulus 10.

[Mahesh_K_Sreenivas]

@joh

Hi,

Can anyone help me how to create a java service to add a checksum using Luhn algorithm?
I want to add 2 digit checksum to my number.

example: 006244914 → 00624491411

I dont want to do this as a flow service.

/J

Yes it is possible, do you mind sharing the algorithm in steps.

I see your input is 006244914 and output is suffixed by 11 i.e, 00624491411

Do you have logic behind this to generate the output as above.

[joh]

Hi,

The logic is the luhn algorithm [u]http://en.wikipedia.org/wiki/Luhn_algorithm[/u] but with two digits as control, maybe this is the difficult part. I dont find an example of that.

[Tong_Wang]

If I understand it correctly, Luhn algorithm works only with one check digit. You are looking for extending the algorithm, not finding a way to code it.

[Mahesh_K_Sreenivas]

@joh

Hi,

The logic is the luhn algorithm [u]http://en.wikipedia.org/wiki/Luhn_algorithm[/u] but with two digits as control, maybe this is the difficult part. I dont find an example of that.

What is your requirement? Is it something you are trying to validate the Credit card number or IEMI?