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## Using X509 Certificates.

## Overview.

X509 certificate is one of many possible keys data object that can be associated with a key. Application may read and write X509 data from/to XML file. The X509 certificates management policies significantly vary from one crypto library to another. The examples in this chapter were tested with OpenSSL and they might be broken if anither crypto engine is used. Check API reference documentation for more specific information about your crypto engine.