[Annotation] Verify that the signature on the KeyPackage is valid using the public key in leaf_node.credential.

[duesee]

Verify that the signature on the KeyPackage is valid using the
public key in leaf_node.credential.

---

Annotation

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    {
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      "value": "key_package"
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  ],
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    "selector": [
      {
        "type": "TextQuoteSelector",
        "exact": "Verify that the signature on the KeyPackage is valid using the\n      public key in leaf_node.credential."
      },
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        "type": "TextPositionSelector",
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    ]
  },
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