The blog discusses the implementation of client assertions for the client credentials flow using OAuth 2.0 DPoP, focusing on machine-to-machine authentication.
DPoP strengthens security by ensuring the client possesses a specific key at the time of the request, enforcing token binding.
Duende IdentityServer supports DPoP well, requiring the Enterprise license for DPoP feature usage with the client credentials flow.
The blog provides code snippets and setups for OAuth client credentials flow, client assertions middleware, and DPoP implementation using RSA keys.