June 2026 — nrfconnect/sdk-nrf Key features delivered: - Automatic ECDSA hash algorithm derivation in the cc3xx driver: derive required hash from length for ECDSA verification when algorithm is not explicitly specified. Commit: 600beea5f4a36bda2e132ea651bf0d1ef33276c7. - RSA-based certificate testing in the PSA TLS sample: add RSA testing support, new overlays/configs, refactored test suite, memory optimizations for targeted hardware. Commit: 7025d2be48f5ecb5187bd5d28bacd7faee794593. - TLS 1.3 ciphersuites and security alignment via dependencies: update sdk-zephyr and sdk-oberon-psa-crypto to enable TLS 1.3 and align RSA PSS for TF-M compatibility. Commit: 3583679e0c2a5aadd2f25e1b9711884dcef3db30. Overall impact: - Strengthened cryptographic interoperability and TLS readiness on target hardware. - Expanded test coverage for RSA in PSA TLS and improved memory efficiency. - Reduced configuration drift through dependency alignment and TF-M compatibility fixes. Technologies/skills demonstrated: - C, embedded cryptography (ECDSA, RSA), PSA Crypto, TF-M, TLS 1.3 - Zephyr SDK, Oberon PSA crypto module, cc3xx driver - Build overlays, test refactoring, and hardware-aware optimizations.

Month: 2026-03. Focused on expanding cryptographic platform coverage in the nRF Connect SDK. Delivered the following key feature: nRF54LM20 Platform Support in AES CBC and AES CTR samples, enabling multipart cipher operations and expanding device compatibility. No major bugs fixed this month; efforts centered on feature enablement and code/documentation quality. Impact: broader hardware support for cryptographic samples, accelerating customer testing and deployment on the new nRF54LM20 family. Technologies demonstrated: cross-device sample updates, YAML configuration management, and rigorous commit hygiene (Signed-off-by).

February 2026 monthly summary for nrfconnect/sdk-nrf focusing on cryptographic hardening and efficient resource management within the security subsystem. Delivered ChaCha20 key preparation and hardware reservation for block cipher operations, strengthening key lifecycle handling and secure ChaChaPoly workflows on supported Nordic devices (notably nRF54LM20A). This work improves security posture, enables secure multipart encryption, and aligns with NCSDK-37681 references.

January 2026 monthly highlights across nrfconnect/sdk-nrf, zephyrproject-rtos/zephyr, and nrfconnect/sdk-zephyr. Delivered features and stability improvements with security focus, performance optimization, and build reliability across multiple repositories. The work emphasizes business value through stronger cryptography, memory-efficient TLS samples, and robust cross-repo guardrails that reduce risk in deployments and CI pipelines.

Month: 2025-10 — Focus on strengthening PSA key handling and security options in the nrfconnect/sdk-nrf repository. Key deliverable: PSA Key Attribute Generation Enhancement enabling 256-bit key support for HMAC_SHA256. Extended generate_psa_key_attributes.py to validate 128-bit and 256-bit keys, enabling larger key sizes and broader security options across PSA workflows. Impact: improves security posture for PSA deployments, supports higher assurance requirements and future hardware. Notable engineering effort with a well-documented, signed-off change.

Concise monthly summary focusing on business value and technical achievements for 2025-08, highlighting the PSA key attributes work in the nRF Connect SDK.

June 2025: Implemented Key Management Unit (KMU) ChaCha20 key generation to enable secure ChaCha20 provisioning via PSA Crypto. This feature extends KMU capabilities and strengthens cryptographic key management in the nrfconnect/sdk-nrf stack.

May 2025 summary for repository nrfconnect/sdk-nrf: delivered critical cryptography driver improvements enabling larger-key support and fixed key management logic to strengthen security posture and reliability across KMU and Cracen components.

Month: 2025-04 – No new features released for nrfconnect/sdk-nrf; the focus was on hardening critical security paths and stabilizing the PSA Crypto service. The primary effort delivered a robust fix for zero-sized input buffers in prepare_out_buffer, preventing potential NULL pointer issues and improving reliability in production. This work reduces crash risk and supports more robust crypto operations in customer deployments.

March 2025: Delivered enhancements to the PSA crypto driver wrappers to support key wrapping/unwrapping and storage-local key handling, enabling secure local key management and smoother integration with storage backends. Introduced conditional compilation for an oberon key wrap driver to support future hardware-backed key storage. Addressed build constraints related to linker options to prevent garbage collection of code sections, ensuring stable builds and predictable behavior.

January 2025 monthly summary for nrfconnect/sdk-nrf: focused on strengthening cryptographic correctness by fixing HKDF-EXTRACT PRK length handling in the nrf_security driver. The PRK copy length now follows the active SHA variant length rather than a fixed 32 bytes, preventing data truncation and potential buffer overflows. The change improves security posture and reliability in production deployments.

December 2024 monthly summary for NordicBuilder/sdk-nrf. Focused on expanding hardware platform coverage and strengthening TLS/DTLS cryptographic capabilities. Delivered a new nrf54h20 platform integration for the PSA TLS sample, enabling TLS and DTLS on the nrf54h20dk device. Included new configuration and overlay files and updated sample.yaml to reflect the new targets and DTLS configurations, aligning with the roadmap to broaden cryptographic support across Nordic hardware. This work delivers immediate business value by enabling customers to deploy TLS/DTLS on a broader set of devices, improving security posture and time-to-market for new hardware.

Month: 2024-11 | NordicBuilder/sdk-nrf Focus: PSA TLS sample enhancements for clarity, stability improvements, and reliable resource management. Delivered targeted documentation update and a runtime reliability fix that reduces port-in-use issues for end-users.