Private Key JWT authentication in WSO2 Identity Server

Kayathiri Mahendrakumaran
Identity Beyond Borders
6 min readFeb 8, 2023

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Private Key JWT is a method of client authentication where the client creates and signs a JWT using its own private key.

Confidential clients use an assertion to authenticate the authorization
server’s token endpoint.

Why authenticate OAuth 2.0 clients?

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Kayathiri Mahendrakumaran
Identity Beyond Borders

Senior Software Engineer 👨‍💻, WSO2 | Undergraduate👩‍🎓 , Computer Science & Engineering | Writer ✍️