DonAsako
Security Researcher & Penetration Tester
French security researcher specializing in penetration testing, vulnerability research, and CTF competitions. Breaking systems to understand how they work, writing about security findings, and sharing knowledge with the community.
About
The name combines 旭 (asa) meaning "morning sun" and 子 (ko) meaning "child" — together forming "child of the morning". Like a child at dawn, approaching each challenge with curiosity and fresh perspective.
Projects
CSSInj
CSSINJ is a tool that exploits CSS injection vulnerabilities to exfiltrate sensitive information from web applications. This tool is designed for security professionals to assess the security posture of web applications by demonstrating how CSS can be used to extract data covertly.
Eskoz
Eskoz is a Django-based project designed to help you quickly and easily create a multilingual blog, with a straightforward deployment process.
Links
Recent Articles
Mathematical language
MathematicsThis article introduces the fundamental elements of mathematical language used throughout the cryptography course, including topics such as RSA and elliptic curve cryptography. It presents the core symbols, notations, and logical conventions required to read, interpret, and write rigorous mathematical statements. Mastery of this language is essential for understanding formal definitions, proofs, and algorithms in modern cryptography.
Wiener's Attack
CryptanalysisThis article provides a comprehensive introduction to Wiener’s attack, a classical and powerful cryptanalytic technique targeting RSA implementations that use an excessively small private exponent.