Defining the Client Identifier A client ID is a public identifier string assigned to an application during the registration process with an authorization server. Its primary purpose is to tell the server, "I am this specific application," allowing the server to look up the associated permissions, redirect URIs, and allowed scopes.
Client ID Lookup Developer Tools: Finding Your Application's Identifier
Without it, systems would struggle to distinguish one client from another, leading to potential security vulnerabilities and a poor user experience. Unlike a secret, this value is not meant to be hidden and is often embedded directly into the source code of a client application.
A public client, such as a mobile app or a JavaScript web app, cannot securely store a secret. It is critical to treat this identifier with care; while it is not a secret, exposing it widely can allow malicious actors to conduct phishing attacks using the legitimate branding of the associated service.
Client ID Lookup Developer Tools: Finding Your Application's Identifier
Distinguishing Between Public and Confidential Clients The security classification of a client often dictates how the client ID is handled. Because it is public, it poses no security risk on its own; the security of the flow relies on the subsequent handling of tokens and the protection of the client secret, which is never exposed to the user's browser.
More About What is client id
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