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Secure API design requires multiple strategies to protect sensitive data and access.

API keys help identify clients and control their access to APIs securely.

SSRF is a vulnerability where an attacker tricks a server into making unintended requests.

Zero Trust Architecture ensures that no user or device is trusted by default.

Authentication verifies who you are, while authorization determines what you can do.

Retention policies help manage how long data is kept in databases.

KMS securely manages encryption keys to protect data from theft.

OAuth 2.0 lets apps access user data securely without passwords.

CSRF tricks your browser into making requests without your consent.

Session-based authentication uses cookies to remember users after login.

Token expiration and refresh token rotation secure user sessions by limiting token lifespan and preventing unauthorized access.

Password hashing with unique salts ensures security by creating different hashes for identical passwords.

OpenID Connect allows apps to authenticate users and verify their identities securely.

Encryption at rest and in transit are essential for protecting data both stored and in motion.

Hashing is one-way for verification, while encryption is two-way for confidentiality.