Sharif CTF 13

8st SharifCTF Android WriteUps: Vol I

Barnamak WriteUp

Two weeks ago, SharifCTF was hold and the questions were acceptable. We attended with CGU team name and and gain the 44th place among the 682 attended teams, whom has at least one question solved in the CTF. In this post I described the writeup for the question about reverse engineering of Android app with 200 points (the 3rd question of reverse section).

Sharif CTF 1
Sharif CTF 1
Introduction to Cryptography and PGP 1

“Introduction to Cryptography and PGP” Workshop

I have a workshop titled “Introduction to Cryptography and PGP” at Urmia University of Technology. I talked about basic concepts of signature and encryption using asymmetric cryptography. Then I talked about PGP which is one of the main usages of this system. I followed the workshop with configuring Thunderbird and GPG4win for applying PGP in Email system. You may find the contents in my previous post about GPG in Thunderbird and the way PGP works.

The pictures of this session is here.

IVRE! Drunk Frenchman Port Scanner Framework!

IVRE! Drunk Frenchman Port Scanner Framework!

You may have visit SHODAN (The IoT search engine) or ZoomEye (World Wide Port Search Engine). The systems are very useful to have a good view of world! 🙂

But they have restriction for seeing results. For example SHODAN lets for unregistered users to view just 1 page (10 results). If you registered, the limitation is 5 pages. But again restriction!

So what to do?