I would use a one-way-function for that. See here for some explanation on one-way-functions. Although in your case it might be overkill, i.e. you don't state that it has to be difficult/impossible to calculate the original out of the generated code. Still a one way function does what you want. Take a look at some of the Crypt modules.

In reply to Re: Need and algorithm to converse characters to unique and permanent Serials by dHarry
in thread Need and algorithm to converse characters to unique and permanent Serials by Sombrerero_loco

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