
Hardware-based PIN verification using irreversible physical memory ops on TROPIC01 chip.
Hardware-based PIN verification using irreversible physical memory ops on TROPIC01 chip.
Tropic Square TROPIC01 MAC-and-Destroy PIN Verification is a hardware-based PIN authentication mechanism implemented on the TROPIC01 secure chip. It replaces conventional PIN verification approaches that rely on stored hashes and software retry counters with a physically irreversible hardware operation. How it works: - Each PIN attempt triggers a two-step hardware operation using a KMAC (Keccak-based Message Authentication Code) engine - The first KMAC core generates a hardware fingerprint unique to the chip and writes it into a dedicated memory slot, overwriting and physically erasing the previous slot content - A second KMAC core combines the old slot value with the new one; if the relationship matches the expected result, the PIN is accepted - If verification fails, the slot is permanently consumed and cannot be retried, replayed, or reset - The entire read-compute-write-verify sequence is indivisible; skipping any step breaks verification entirely Key security properties: - No stored hash exists to extract - No retry counter exists to reset or glitch - No branching comparison logic exists for fault injection attacks - Each attempt permanently changes physical hardware state, making rollback attacks (voltage manipulation, memory dumps, state restoration) ineffective - PIN values are mixed at two separate cryptographic stages using chip-unique PUF (Physically Unclonable Function) keys, providing protection against malicious chip manufacturers or compromised provisioning pipelines - Supports multiple independent PINs protecting the same secret, each with separate verification data and encrypted material - Includes a Wiping PIN that appears as a normal PIN check but triggers irreversible memory self-destruction when entered, intended for duress scenarios The TROPIC01 chip uses an open, auditable architecture intended for applications such as hardware wallets, IoT devices, and critical infrastructure.
Common questions about TROPIC01 MAC-and-Destroy PIN Verification including features, pricing, alternatives, and user reviews.
TROPIC01 MAC-and-Destroy PIN Verification is Hardware-based PIN verification using irreversible physical memory ops on TROPIC01 chip, developed by Tropic Square. It is a IAM solution designed to help security teams with Hardware Security, Authentication, Physical Security.
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