https://whoisarjen.com/blog Senior Full-Stack Engineer specializing in high-performance e-commerce, scalable architecture, and performance optimization. TypeScript, React, Next.js, Vue, Nuxt, PostgreSQL, Redis. en-us kamilow97@gmail.com (Kamil Owczarek) kamilow97@gmail.com (Kamil Owczarek) Sun, 15 Mar 2026 12:00:00 GMT https://whoisarjen.com/blog/hmac-timestamp-tokens-zero-trust-service-communication https://whoisarjen.com/blog/hmac-timestamp-tokens-zero-trust-service-communication How we secured inter-service communication with HMAC-SHA256 signed tokens that expire in 10 seconds — no session state, no API keys to rotate, no middleware databases to query. Sun, 15 Mar 2026 12:00:00 GMT kamilow97@gmail.com (Kamil Owczarek) SecurityHMACArchitectureNode.jsTypeScriptMicroservicesAuthentication