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GUIAR OQBA

Low-Level Systems Developer | Security Researcher | Binary Explorer

Breaking systems to make them stronger. Builder of GuiarStr, a modern C string library designed for performance, safety, and simplicity. Passionate about open-source development and reversing technologies.

📦 FEATURED PROJECT: GUIARSTR

GuiarStr - C String Utility Library

GuiarStr is a lightweight and secure C string library designed to replace unsafe functions with clean, modular, and testable components.

Key Features:
  • Memory-safe string operations
  • Buffer overflow protection
  • UTF-8 support
  • Minimal memory footprint
  • Comprehensive test suite
Use Cases:
  • Systems programming
  • Embedded development
  • Security-critical applications
  • Performance-sensitive code
  • Legacy code modernization
1.0.0
Latest Release
20+
Functions
MIT
License
100%
C99 Compatible
View on GitHub Libraries.io LibHunt Download v1.0.0

🛠️ OTHER PROJECTS & TOOLS

Frida Hook Toolkit

Custom C-level hooks for analyzing Android/iOS apps and browser traffic.

Security Reverse Engineering
String Hunter

Recursive sensitive string scanner in binary files with pattern matching and entropy filter.

Forensics Binary Analysis
r2 Power Scripts

Advanced r2 + GDB automation scripts for tracing memory and symbol resolution.

Debugging Automation

🧾 PUBLISHED REPORTS

Report Title #1

Third Report on Entropy Patterns Concerning Repetitions in 24-Word Mnemonic Phrases.

View Report
Report Title #2

Statistical Weaknesses in BIP39 Seed Phrases and Their Real-World Implications

View Report

🔧 TECHNICAL SKILLS

C/C++ 95%
x86/ARM Assembly 90%
Reverse Engineering 85%
Binary Exploitation 80%
Cryptography 75%
Web3 & Blockchain 70%
$ whoami
guiar_oqba
$ cat skills.txt
Low-level systems programming
Binary analysis and reverse engineering
Security research and vulnerability assessment
C library development and optimization
$ _

📅 JOURNEY

2023 - Present
GuiarStr Development
Designed and developed GuiarStr, a modern C string library focused on security and performance.
2022
Security Researcher
Published research on statistical weaknesses in BIP39 seed phrases and their implications.
2021
Binary Analysis Tools
Created custom tools for binary analysis and reverse engineering, including String Hunter and r2 scripts.
2020
Low-Level Programming
Started deep dive into systems programming, assembly languages, and memory management.

🌐 GET IN TOUCH

GitHub

github.com/okba14

ORCID Profile

orcid.org/0009-0008-1629-0002

Zenodo Community

zenodo.org/communities/guiar/

Hashnode Blog

hashnode.com/@okba

Telegram

@Okba_elkantara

LinkedIn

linkedin.com/in/guiar-oqba

Phone

+213 671 36 04 38