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Security

Follow trust boundaries, identities, and untrusted data through a system.

Learn threat modeling, least privilege, cryptography, password storage, TLS identity, input handling, browser defenses, authorization, secrets, and isolation.

1 article · 1 video · 1 trace · 1 request flow · 1 interview · 5 total

Articles

securitySep 25, 2026

Security Follows Data and Authority Across Boundaries

Threat-model a request by tracing sensitive data, user authority, trust boundaries, and the controls that limit abuse.

8 min readRead

Request Flows

request flow · 5 stagesA Password Login Establishes a Protected SessionFollow request limits, account lookup, password verification, session rotation, and later authorization checks.

Videos

In production

securitySep 25, 2026

What Happens When a Password Is Checked

A planned security walkthrough traces an authentication request through abuse controls, password verification, and session creation.

Details

Traces

trace 01 · serverTrace Password Verification During LoginFollow a login attempt through rate limits, password-hash verification, authorization context, and a protected session cookie.

Interviews

medium · t2Why Is a Password Hashed Instead of Encrypted?A security prompt about password verifiers, salts, offline guessing, authentication, session creation, and authorization.

Explore adjacent

networking backend engineering computer systems software engineering threat modeling and trust boundaries password storage and cryptography browser input security

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