I need help with Variable level encryption of SSN. SAS help desk sent me
references to two papers.
1) Annette Landan-Effective Data Encryption Algorithm.
2) Sheng Luo-Using Bitwise Function to Scramble Data fields with Key.
The second paper (Luo) does have some interesting method to encrypt credit
card # but when I ran it on a test dataset I found that if the record
repeated itself it was encrypted differently. And that just wont fly with
medical records where the same SSN will have multiple observations.
I did see some Macros on the UGA list serve archives but I was wondering if
someone has any updated version of the same or perhaps newer algorithms. If
they are FIPS 140 compliant that would be even better.