ANSSI’s CyberDico: The Ultimate Cybersecurity Dictionary for Clear Communication

The ANSSI (Agence nationale de la sécurité des systèmes d’information) has released the CyberDico, an essential resource for cybersecurity professionals, offering 185 clear and updated definitions to standardize terminology across teams (dev, security, infra, product, etc.). This dictionary helps:

✔️ Harmonize vocabulary in teams

✔️ Avoid misunderstandings in audits, tenders, or awareness campaigns

✔️ Strengthen credibility with clients and stakeholders

🔗 Download the CyberDico here: https://lnkd.in/ey5kyfFE

You Should Know:

1. Key Cybersecurity Terms & Practical Commands

• Identification vs. Authentication
• Identification: Verifying an entity (e.g., username).

  </li>
  </ul>
  
  <h1>Linux: List users</h1>
  
  cat /etc/passwd 
  

  – Authentication: Proving identity (e.g., password, SSH key).

  
  <h1>Generate SSH key</h1>
  
  ssh-keygen -t ed25519 
  

  • Encryption vs. Hashing
  • Encryption (reversible): Securing data with a key.

    </li>
    </ul>
    
    <h1>Encrypt file with AES (OpenSSL)</h1>
    
    openssl enc -aes-256-cbc -salt -in file.txt -out file.enc 
    

    – Hashing (irreversible): Creating a fixed-size fingerprint.

    
    <h1>Generate SHA-256 hash</h1>
    
    echo -n "secret" | sha256sum 
    

    2. Securing Systems with ANSSI Guidelines

    • Check for Vulnerabilities (Linux):

      </li>
      </ul>
      
      <h1>Scan open ports</h1>
      
      nmap -sV 192.168.1.1
      
      <h1>Check for updates (Debian)</h1>
      
      sudo apt update && sudo apt upgrade 
      

      • Windows Security Audit:

        </li>
        </ul>
        
        <h1>List active processes</h1>
        
        Get-Process
        
        <h1>Check firewall rules</h1>
        
        Get-NetFirewallRule | Select-Object Name, Enabled 
        

        3. Network Security Practices

        • Monitor Traffic:

          </li>
          </ul>
          
          <h1>Capture packets (tcpdump)</h1>
          
          sudo tcpdump -i eth0 -w traffic.pcap 
          

          – Block Suspicious IPs:

          
          <h1>Linux firewall (iptables)</h1>
          
          sudo iptables -A INPUT -s 1.2.3.4 -j DROP 
          

          What Undercode Say:

          The CyberDico bridges gaps between technical and non-technical stakeholders, ensuring precise communication in cybersecurity. Pair it with hands-on commands like OpenSSL encryption, Nmap scans, and firewall rules to enforce best practices. For teams, consistency in terminology prevents costly errors—whether in code reviews (git diff), incident reports, or compliance audits (lynis audit system).

          🔗 Reference: ANSSI CyberDico

          Expected Output:

          A structured guide combining ANSSI’s definitions with actionable commands for Linux/Windows security.

          References:

          Reported By: Cousinhub Cyber – Hackers Feeds
          Extra Hub: Undercode MoN
          Basic Verification: Pass ✅

          Join Our Cyber World:

          💬 Whatsapp | 💬 Telegram