https://parthivkumarnikku.github.io/portfolio/docs/blog/index.html CTF write-ups, penetration testing techniques, and offensive security research. en-us https://parthivkumarnikku.github.io/portfolio/docs/blog/html/Gmail Plus Addressing.html https://parthivkumarnikku.github.io/portfolio/docs/blog/html/Gmail Plus Addressing.html Thu, 19 Feb 2026 00:00:00 -0000 Description: Most People Use Gmail Daily — Almost Nobody Uses This Built-In Security Feature. There is a simple, built-in mechanism in Gmail that materially… https://parthivkumarnikku.github.io/portfolio/docs/blog/html/IITB25-Breached-Writeup.html https://parthivkumarnikku.github.io/portfolio/docs/blog/html/IITB25-Breached-Writeup.html Sat, 29 Nov 2025 00:00:00 -0000 Challange Description: The admin email of Acme Surveys was leaked, but the identity of the admin is unknown. The objective was to identify the admin email… https://parthivkumarnikku.github.io/portfolio/docs/blog/html/THM-TryHeartMe.html https://parthivkumarnikku.github.io/portfolio/docs/blog/html/THM-TryHeartMe.html Mon, 16 Feb 2026 00:00:00 -0000 Challange Description: The TryHeartMe shop is open for business. Can you find a way to purchase the hidden "Valenflag" item? Introduction The challenge… https://parthivkumarnikku.github.io/portfolio/docs/blog/html/THM-Valenfind.html https://parthivkumarnikku.github.io/portfolio/docs/blog/html/THM-Valenfind.html Sat, 14 Feb 2026 00:00:00 -0000 Challange Description: There's this new dating app called "Valenfind" that just popped up out of nowhere. The creator only learned to code this year — which…