Evaluation assurance level (EAL2+) is an evaluation method for IT systems to comply with the common criteria for security evaluation. Common criteria (CC) are an international set of guidelines and specifications developed for evaluating information security products, specifically to ensure they meet an agreed-upon security standard for government deployments.
A product or system must meet specific assurance requirements to achieve a particular EAL level. Requirements involve design documentation, analysis, and functional or penetration testing performed by an accredited lab.