How to decode the encoded historical documents extracted from Taleo TCC and make them readable?

Summary

How to decode the encoded historical documents extracted from Taleo TCC and make them readable?

Content

We are in conversion phase of Taleo to ORC transition and have a requirement to store the historical data. But as the candidate Documents data extracted form Taleo is in Encode xml files, we are looking for a solution to convert them into a readable format for our users to access when needed.