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Finish dangling sentence
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expede committed Jul 1, 2024
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Expand Up @@ -545,7 +545,7 @@ sequenceDiagram

## What prevents an unauthorized party from using an intercepted UCAN?

UCANs always contain information about the sender and receiver. A UCAN is signed by the sender (the `iss` field DID) and can only be created by an agent in possession of the relevant private key. The recipient (the `aud` field DID) is required to check that the field matches their DID. These two checks together secure the certificate against use by an unauthorized party. [UCAN Invocations][invocation] prevent
UCANs always contain information about the sender and receiver. A UCAN is signed by the sender (the `iss` field DID) and can only be created by an agent in possession of the relevant private key. The recipient (the `aud` field DID) is required to check that the field matches their DID. These two checks together secure the certificate against use by an unauthorized party. [UCAN Invocations][invocation] prevent use by an unauthorized party by signing over a request to use the capability granted in a delegation chain.

## What prevents replay attacks on the invocation use case?

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