During January 2026, Lightclient enhanced cryptographic compliance across the Ethereum ecosystem by implementing AES blocksize-based length validation for ECIES decryption in the bnb-chain/bsc and maticnetwork/bor repositories. Using Go and leveraging backend development and cryptography expertise, Lightclient updated decryption logic to validate message lengths against AES standards, addressing security gaps and ensuring consistency across projects. In go-ethereum, Lightclient fixed a bug in ECIES length validation, further aligning the codebase with cryptographic best practices. This work improved security posture and reduced risk, demonstrating a focused approach to cross-repository standardization and collaborative engineering within the Go and blockchain development landscape.