The choice of cryptographic primitives in Securebit was made based on a balance between maturity, availability, and implementation simplicity at the time of the current architecture design. The goal was not to introduce experimental or fragile constructions, but to rely on well-studied, widely deployed primitives that are available across standard cryptographic libraries and can be audited and replaced as the protocol evolves. The system is intentionally designed to be modular. Cryptographic components are not treated as fixed marketing claims, but as replaceable building blocks. This is important because in real-world systems, cryptography evolves, and protocol agility is more valuable than locking into specific primitives. If there are concrete proposals for improving the cryptographic layer - including modern primitives, protocol adjustments, or security model refinements - contributions are welcome. The project is open to review and discussion via the GitHub repository.