D. SATAN was the first vulnerability assessment program and was designed to find vulnerabilities in a network. Programs such as Retina and Nessus are also used for vulnerability assessments. SATAN is not used for password cracking and is not used to break into systems. Solution D. SATAN was the first vulnerability assessment program and was designed to find vulnerabilities in a network. Programs such as Retina and Nessus are also used for vulnerability assessments. SATAN is not used for password cracking and is not used to break into systems..