Defensive 게시물

What is the CIA triad? Confidentiality, integrity and availability explained, with a real attack on each and commands to check them on your own systems.

What Windows Event ID 4625 means, how to read its status codes and logon types, and how to tell a mistyped password from a brute-force or password spraying attack.

Learn how to check email headers for phishing. View full headers in Outlook, Gmail and Apple Mail, read the Received chain and understand SPF, DKIM and DMARC results.