Library term·FinTech & data science
JWT Authentication for FinTech APIs — Rotation, Replay and Secret Hygiene
RS256 vs HS256, short-lived AT + refresh RT, JWKS pinning, revocation strategies and SSRF pitfalls on introspection URLs.
Authored by·Editorially reviewed
Onur Erkan YıldızFounder, Financial Engineer · CMB-licensed
Higher education in Financial Engineering and Money & Capital Markets. SPK (Turkey CMB) licence. 16 years across institutional markets, research, and quant-driven analytics.
Bearer caveats JWTs prove cryptographic issuance — not inherently caller identity freshness unless lifetimes minimal.
Split tokens
Prefer opaque refresh + short access for browser danger surfaces.Revocation
Central denylist or rotating kid strategy on compromise.Finvestopia
Security copy should never oversell “stateless = safe.”Related entries
Docker Compose for Reproducible Quant Research Stacks
Service graphs, pinned images, seed scripts, secret injection and CI parity for notebook-to-service pipelines.
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Token bucket, exponential backoff with jitter, per-tenant fairness and abuse containment for websocket farms.
Educational content authored by our team — informational only, not investment advice.