embedded cryptography

About this tag
The embedded cryptography tag on WindowsForum.com covers discussions about cryptographic libraries and implementations designed for resource-constrained devices. Recent content focuses on a timing vulnerability (CVE-2025-12888) in X25519 implementations on Xtensa-based ESP32 chips, and how the wolfSSL library addressed it by changing build defaults to safer, constant-time code. This tag is relevant for developers and security professionals working with embedded systems, IoT devices, and firmware security, particularly those using Windows-based development tools or cross-compilation environments. Topics include constant-time cryptography, elliptic curve primitives, and mitigations for side-channel attacks in embedded contexts.

  1. CVE-2025-12888 Timing Fix for Xtensa ESP32 X25519 in WolfSSL

    A subtle timing weakness in X25519 implementations that affects Xtensa-based ESP32 chips has been logged as CVE-2025-12888, and wolfSSL—one of the mainstream embedded crypto libraries—has already shipped a targeted mitigation that changes build defaults for Xtensa targets to safer, low‑memory...
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    • constant time embedded cryptography timing side channel xtensa esp32
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    • Forum: Security Alerts