SHA-256 chaining

Automation & IoT Applications
Building a Secure Audit Trail System With Immutable Logs Stored on External SPI Flash
ByMichail March 26, 2026
I built an unbreakable audit trail on Arduino—see how SHA-256 chaining and hardware signing make logs tamper-evident forever.
Read More Building a Secure Audit Trail System With Immutable Logs Stored on External SPI Flash