CODEWITHSUNDEEP
encryptionhashcryptography
Toby
Toby

Reputation: 1

Encryption or Hashing of Date Value

I have an old program that has been discontinued which communicates with an SQL database. When I enter certain information in the defunct software, it is encrypted, encoded, or hashed before being entered into the database.

I am creating another application to interact with the same data, and I need to figure out how the end result is being produced.

Here's an example:

I enter 6/18/2017,  I get y/7w/iXIE

I enter 6/18/2099,  I get y/7w/iXBM

I enter 6/12/2017,  I get y/7c/iXIE

I enter 12/11/2018, I get SN/u0/ZmWk

The last one throws me for a loop... what method is being used and how can I replicate this?

Upvotes: 0

Views: 231

Answers (1)

zaph
zaph

Reputation: 112873

It might be format preserving encryption or just substatutions. In all cases the number of characgters in each section delimited by / are the same number of characters. With enough samples, all 12 months, 31 days and years you should be able to match the method.

6/18/2017
y/7w/iXIE

6/18/2099
y/7w/iXBM

6/12/2017
y/7c/iXIE

12/11/2018
SN/u0/ZmWk

months:    6 -> y,      12 -> SN  
days:     11 -> u0,     12 -> 7c,     18 -> 7w  
years:  2017 -> iXIE, 2018 -> ZmWk, 2099 -> iXBM

Upvotes: 1

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