LowFile-scopeC# Plug & play

Cookie policy with SameSite and Secure defaults

Configure CookiePolicyOptions to enforce SameSite=Lax or Strict, HttpOnly, and Secure for all auth cookies.

Why this matters

Proper cookie settings reduce session attacks and align with SOC 2.

Side-by-side examples engineers can pattern-match during review.

Avoid

options.MinimumSameSitePolicy = SameSiteMode.None;

Prefer

options.MinimumSameSitePolicy = SameSiteMode.Lax; app.UseCookiePolicy(options);

Good

options.HttpOnly = HttpOnlyPolicy.Always;

Bad

options.Secure = CookieSecurePolicy.None;

From the same buckets as this rule.

Critical
Encrypt sensitive data at rest with KMS and rotate keys
Use envelope encryption (AES-256-GCM) with cloud KMS-managed CMKs for databases, object storage, and backups. Rotate CMKs at least annually and rotate DEKs per object/file.
compliance-soc2-essentialssecrets-credentials+1
Critical
Enforce TLS 1.2+ and HSTS on all external endpoints
Public services must require TLSv1.2 or higher and set HSTS (max-age ≥ 15552000, includeSubDomains). Reject plaintext HTTP and weak ciphers; cookies must be Secure and HttpOnly with SameSite set.
compliance-soc2-essentialssecurity-hardening+1
Critical
Use a secrets manager and 90-day rotation policy
All credentials (API keys, DB passwords, tokens) must be stored in a secrets manager with automatic rotation ≤ 90 days; forbid hardcoded or .env-committed secrets via CI checks.
compliance-soc2-essentialssecrets-credentials+1