TLS SDK (also known as uSSL TLS SDK) by Cypherbridge Systems is a portable ANSI C software stack implementing standards-based SSL and TLS protocols, including versions 1.3, 1.2, 1.1, and 1.0. It provides functionality for PKI X.509 certificates, cryptographic operations, hashing, and network protocols. Designed for embedded applications and vertical markets, it offers device-level secure solutions. The SDK employs interoperable, scalable features to securely authenticate and cryptographically secure end-to-end system network connections. It can be integrated with existing or new applications and tailored for an optimal memory footprint. The SDK includes self-test support for integration, testing, and compatibility verification, as well as platform kits to integrate with various TCP stacks, wired and wireless networks. It provides a balance of security, memory usage, and performance in small to medium-sized implementations.