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User Authentication
Authentication is the process of confirming the truth of each logged in user’s
identity to prevent unauthorized access to your organization or its data.
Salesforce provides each user in your organization with a unique username and password
that must be entered each time a user logs in.
Salesforce issues a session cookie only to record encrypted authentication information for the duration of a specific session. The session cookie does not include either the username or password of the user. Salesforce does not use cookies to store other confidential user and session information, but instead implements more advanced security methods based on dynamic data and encoded session IDs.