To introduce greater flexibility and accommodate a wider range of use cases in OPC UA implementations, the introduction of an additional profile is suggested. The proposed profile, named "ECC-curve25519-AES-128-GCM," would utilize Curve25519 instead of nistP256 for key exchange, coupled with AES-128-GCM for encryption. This profile offers enhanced security while catering to scenarios where the use of nistP256 may not be ideal or desired.

By incorporating the ECC-curve25519-AES-128-GCM profile, OPC UA implementations can stay ahead of security challenges and adapt to diverse deployment environments more effectively. This addition will provide users with a modern encryption alternative and ensure compatibility with evolving security standards.