# GUIARX — GUIAR OQBA (قيار عقبة)

> Low-level systems programmer (C, C++, x86-64/ARM Assembly), cybersecurity and vulnerability researcher specializing in advanced fuzzing (AFL++ and custom fuzzing tools), and high-performance Android application developer based in El Kantara, Algeria.

GUIARX is the engineering and security research practice of **GUIAR OQBA** (**قيار عقبة**). Core capabilities include coverage-guided vulnerability discovery using AFL++ and bespoke C/C++ fuzzing harnesses, bare-metal systems engineering in C/C++/Assembly, and native Android application development.

- **Founder & Principal Engineer**: GUIAR OQBA (قيار عقبة)
- **Official Website**: https://guiarx.com/
- **Direct Security & Engineering Contact**: mailto:security@guiarx.com
- **Telegram**: https://t.me/maronyo (@maronyo)
- **GitHub**: https://github.com/okba14
- **ORCID**: https://orcid.org/0009-0008-1629-0002
- **Location**: El Kantara, Biskra, Algeria (Serving Worldwide in English & Arabic)

## Core Pages

- [Home (English)](https://guiarx.com/): Overview of GUIAR OQBA's low-level systems engineering, AFL++ vulnerability fuzzing, live Android applications, and verified disclosures.
- [الرئيسية (Arabic)](https://guiarx.com/ar/): النسخة العربية الرسمية لموقع المبرمج والباحث الأمني قيار عقبة (GUIAR OQBA).
- [Engineering Services & Work](https://guiarx.com/services/): Detailed breakdown of 3 core services: Vulnerability Discovery & Advanced Fuzzing (AFL++), Low-Level Programming (C/C++/ASM), and High-Performance Mobile App Development.
- [Vulnerabilities & Security Research](https://guiarx.com/research/): Verified upstream vulnerability disclosures and peer-reviewed cryptographic security papers.
- [Pricing & Engagement Models](https://guiarx.com/pricing/): Transparent pricing tiers starting at $1,200 for Android/Systems builds, $1,500 for Low-Level C/C++/ASM Engineering, and $2,500 for Deep AFL++ Fuzzing & Vulnerability Audits.
- [About GUIAR OQBA](https://guiarx.com/about/): Engineering background, technical arsenal (AFL++, LibFuzzer, GDB, Ghidra, Radare2, Valgrind, C/C++/ASM), and verification links.
- [Contact & Encrypted Channels](https://guiarx.com/contact/): Direct communication channels for security audits, fuzzing engagements, and software development.
- [Privacy, Terms & Security Policy](https://guiarx.com/privacy/): Legal terms, zero-tracking privacy policy, and responsible vulnerability disclosure framework.

## Vulnerability Disclosures & Security Research

- [Samba CTDB IPC Socket Security Vulnerability Disclosure (MR !4239)](https://guiarx.com/research/samba-ctdb-socket/): Responsible vulnerability discovery and upstream source patch in Samba's Clustered Trivial Database (CTDB) subsystem.
- [Zero-Breach Security Vulnerability Disclosure (PR #8)](https://guiarx.com/research/zero-breach-vulnerability/): Vulnerability discovery, fuzzing analysis, and official upstream acknowledgment in the Zero-Breach security project crediting okba14.
- [Cryptographic Entropy Patterns in BIP39 Implementations](https://guiarx.com/research/bip39-entropy-patterns/): Peer-reviewed research published on Zenodo analyzing deterministic PRNG flaws and bit-distribution anomalies in cryptocurrency wallet generators.
- [Structural Weaknesses in Non-Standard Mnemonic Generators](https://guiarx.com/research/mnemonic-weaknesses/): Peer-reviewed technical paper on custom mnemonic generation routines and PBKDF2 key-stretching weaknesses.

## Live Software & Official External Profiles

- [El Kantara PDF Reader on Google Play](https://play.google.com/store/apps/details?id=com.elkantara.pdfreader&hl=en): Fast, lightweight, security-hardened production Android PDF reader engineered by GUIAR OQBA.
- [Samba Official GitLab Commit & Acknowledgment (!4239)](https://gitlab.com/samba-team/samba/-/merge_requests/4239/diffs?commit_id=692cdabe3a43bb9cc9e3e050415bd0ef6be9ee83): Upstream patch verifying GUIAR OQBA's vulnerability report.
- [Zero-Breach Official GitHub Pull Request (#8)](https://github.com/interplains/zero-breach/pull/8#event-33736605504): Upstream remediation crediting okba14.
- [GitHub Profile (@okba14)](https://github.com/okba14): Open-source systems code, security tooling, and upstream contributions.
- [ORCID Research Record (0009-0008-1629-0002)](https://orcid.org/0009-0008-1629-0002): Verified academic and cryptographic research publications.

## Optional

- [Full Markdown Knowledge Base](https://guiarx.com/llms-full.txt): Complete single-file Markdown documentation of all services, pricing, research, and technical specifications.
- [Markdown Homepage](https://guiarx.com/index.md): Clean Markdown representation of the homepage for AI agents requesting `Accept: text/markdown`.
- [MCP Server Card](https://guiarx.com/.well-known/mcp.json): Model Context Protocol (MCP) discovery card for autonomous agents.
- [Security Policy (RFC 9116)](https://guiarx.com/.well-known/security.txt): Responsible disclosure policy and security contact metadata.