SLSA (Supply-chain Levels for Software Artifacts) is a security framework designed to protect the integrity of software supply chains. Developed by Google and the open-source community, SLSA provides a set of standards and best practices to prevent tampering, improve traceability, and secure the build and distribution process of software artifacts. The framework defines progressive levels of assurance, from basic provenance tracking to fully reproducible builds, enabling organizations to assess and improve their software supply chain security. By adopting SLSA, organizations can mitigate risks related to supply chain attacks and ensure the trustworthiness of their software products.