SECURITY6 records
Security Fundamentals
Defensive, administrative security concepts: firewalls, encryption in transit, authentication, file permissions and hashing. No exploitation content.
These records cover the defensive, administrative side of security: what firewalls, encryption, authentication, permissions and hashing do, and how to reason about exposure. They are educational and diagnostic, not instructions for attacking systems. Where a topic touches a specific port, command or error, the related records link across.
All records
- Authentication basicsProving identity: factors, passwords, MFA and tokensAuthentication is proving who you are; authorisation is what you are then allowed to do. Identity is proven…
- Encryption in transitProtecting data as it moves across a networkEncryption in transit protects data while it moves across a network, so that anyone able to observe the…
- Firewall basicsWhat a firewall does and how Windows profiles workA firewall controls which network connections are allowed in and out of a device or network, based on rules…
- Hashing explainedOne-way functions, integrity and password storageA hash function turns any input into a fixed-size value (a digest) in a way that cannot be reversed. Hashing…
- Open ports and exposureWhat an open port does and does not meanAn open port means a program on a machine is listening for connections there. That is normal and necessary…
- Windows file permissionsNTFS ACLs, ownership and inheritanceWindows controls access to files and folders with NTFS permissions: each object has an access control list…