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## Signing and encrypting documents.

## Overview.

XML Security Library performs signature or encryption by processing input xml or binary data and a template that specifies a signature or encryption skeleton: the transforms, algorithms, the key selection process. A template has the same structure as the desired result but some of the nodes are empty. XML Security Library gets the key for signature/encryption from keys managers using the information from the template, does necessary computations and puts the results in the template. Signature or encryption context controls the whole process and stores the required temporary data.

Figure 2. The signature or encryption processing model.