CREST Practitioner Security Analyst (CPSA) Practice

What is the purpose of 'secret 7' in Cisco encryption?

1. Secure cleartext in configuration

2. Standard encryption

3. Advanced hash function

4. Public key infrastructure

The correct answer is: Secure cleartext in configuration

The purpose of 'secret 7' in Cisco encryption is to provide a way to secure the cleartext configuration data within Cisco devices. This method utilizes a simple encryption algorithm that transforms passwords and other sensitive information into an obfuscated format. While this obfuscation does not offer the same level of security as modern encryption algorithms, it serves as a deterrent against casual snooping, making it slightly more difficult for unauthorized individuals to read sensitive data in its original form. By keeping the configuration sensitive elements hidden from straightforward visibility, 'secret 7' helps administrators protect vital security credentials when viewed in plaintext, especially in configuration files. This added layer of security aligns with basic security principles within network management practices, emphasizing the importance of safeguarding sensitive information from potential threats. Though there are stronger encryption methodologies and security techniques available, 'secret 7' is particularly noted for its practicality and ease of implementation when managing Cisco device configurations.