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A signature can contain signatures by one or more keys. The set of keys used to create a signatures is contained in a context, and is applied to all following signing operations in this context (until the set is changed).
| • Selecting Signers: | How to choose the keys to sign with. | |
| • Creating a Signature: | How to create a signature. | |
| • Signature Notation Data: | How to add notation data to a signature. |