Web Security / Basic: web trust and identity contracts

Web Security โ€” Basic: web trust and identity contracts

Understand protocol semantics, threat requirements, authentication, sessions, access scope, and input meaning.

6 lessons ยท No account required

What you will learn

  • Identify the layer responsible for each security claim.
  • Design owned identity and permission boundaries.
  • Validate data without confusing it with interpretation safety.

  1. HTTP and web trust boundaries

    Trace a request through browser, transport, application, and data boundaries before deciding what a security signal proves.

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  2. Threat modeling and verifiable web requirements

    Connect a featureโ€™s assets and data flows to precise defensive requirements and evidence.

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  3. Authentication, enrollment, and recovery

    Design identity verification and account recovery as one lifecycle while keeping authorization and secrets separate.

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  4. Sessions, cookies, and browser state

    Design session lifetime and cookie scope as separate controls, with explicit rotation, invalidation, and browser assumptions.

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  5. Authorization and tenant-safe resource scope

    Enforce permission using trusted subject and resource context before reading or mutating protected state.

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  6. Validation, parsing, and canonical forms

    Validate data shape and meaning at explicit boundaries without confusing normalization with permission or safe interpretation.

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