# Cybersecurity Guide


  • HASH
  • [CRC-32] [MD5] [SHA-1] [SHA-256] [SHA-512]
  • ENCODING / DECODING
  • [Base16(enc)] [Base16(dec)] [Base64(enc)] [Base64(dec)] [URL(enc)] [URL(enc)(+ASCII)] [URL(dec)] [HTML_entity(enc)] [HTML_entity(dec)]
  • CONVERSION
  • [Hex] [Dec] [Oct] [Bin]

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    •  🏹 Tool
    •  πŸ§ͺ Simulation
    •  πŸ“„ Reference
    •  πŸ’Ύ Misc
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    Root me write-up : Logs analysis - web attack
    This is a quiz to find flags in web server logs. The web server log contains the base64 encoding value in the order variable, and...
  • How to initialize Web3 library in Javascript
    To use Web3, there are two ways to enter an RPC address or use a metamask. Web3λ₯Ό μ‚¬μš©ν•˜λ €λ©΄ RPC μ£Όμ†Œλ₯Ό μž…λ ₯ν•˜κ±°λ‚˜ λ©”νƒ€λ§ˆμŠ€ν¬λ₯Ό μ΄μš©ν•˜λŠ” 방법이 μžˆλ‹€.   1. Using RPC Addr...
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    Public view/pure functions can be simply called. However, in other cases, you need to log in because of gas fee. It can be done with metamas...
  • Square CTF postfuscator write up
      < getFlag #4, Own this NFT! ( Link ) > ▶ How to play Download the provided file( Link ). μ œκ³΅λ˜λŠ” 파일 λ‹€μš΄λ‘œλ“œ. The humans who designe...
  • Method of using relative path without current path in Linux
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    The "cmd1_TT" is the program that executes inputted one argument(argv[1]) and deletes environment variable PATH. "echo123...
  • Root me write-up : Javascript - Obfuscation 3
    Root me write-up : Javascript - Obfuscation 3
    To comply with the write-up rule of root-me.org, in this write-up, I just talk about some hints related to this challenge. Here is no solut...
  • Linux log files
    There are differences in the path and contents of the log files depending on the Linux type and version. Check "/etc/syslog.conf" ...
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