Cyber Security

Useful Resources:

  1. AES Crypt is a file encryption software available on several operating systems that uses the industry standard Advanced Encryption Standard (AES) to easily and securely encrypt files.
  2. Most useful Caesar Cipher Decoder.
  3. A1Z26 Cipher coder/decoder: A1Z26 is very simple direct substitution cypher, where each alphabet letter is replaced by its number in the alphabet.
  4. Best ASCII Converter:
  5. Best Hash and Password Cracking online:
  6. Always remember to check AtBash and Base32 deciphers. Base32 is not available at Rumkin. Use this url for additional deciphers that are not available on Rumkin.
  7. Best Decipher library online:
  8. Check File Type Online:
  9. URL Param Encoder/Decoder:
  10. Magic Bytes:
  11. Recon tool based on URL: and – useful to find out OS of a server.
  12. Online Recon IP Scan:

Recon command: host (linux)

Foot-printing – Routing path analysis –

DNS Information:

  • dig ANY
  • nslookup
  • whois -> provides a lot of information.

Discover Open ports

  • nmap
  • hping

Ping and Ping Sweep

  • Ping tool for one host
  • Ping sweep for many hosts: nmap -sP

IP Scanners

Network Emulators:

Many excellent free Security tools:

750 CISSP Questions for Review on Youtube:

Check you password Strength:

Ethical Hacking Tools

  • Recon tool: people search pipl
  • Domain info research – nslookup. There are many options that can be passed to this command line tool that is available in windows, linux and mac. 
  • Path Analyzer pro – traceroute finally makes sense: