Common use of Impersonation Clause in Contracts

Impersonation. If ▇▇▇▇▇ or ▇▇▇▇▇▇▇ uses the agreed key f to authenticate a message to the other, then using a watcher, ▇▇▇▇▇ can compute f and forge any message. In other words, ▇▇▇▇▇ can impersonate the sender. 1.3. Authentication using agreed keys is a common application of variants of the Diffie–▇▇▇▇▇▇▇ key agreement. For example, the Transport Layer Security (TLS) version 1.3, requires use of elliptic curve Diffie–▇▇▇▇▇▇▇ key agreement, and derives an authentication key from the agreed key, using the derivation method that Bugsy can replicate easily. Diversion 3.1.4. Such authentication transfer is a common application of variants of Diffie–▇▇▇▇▇▇▇ key agreement. The transport layer security protocol TLS 1.3 works this way. A server’s Diffie–▇▇▇▇▇▇▇ delivery is digitally signed, but then all payload message data is authenticated in the record layer using the agree keys.