August 2021 - RoC Research

Longer Ramblings Become Research

Posted in
- Cybersecurity

NUS Greyhats WelcomeCTF 2021: Writeup

Posted byby Jason Chee
August 19, 2021
23 minute read

The National University of Singapore (NUS)’ Greyhats organized a WelcomeCTF from 13 to 15 August 2021. Interestingly, this CTF was sponsored by DSTA, who ran the ill-fated CDDC2021 just 2…

0 Comments

Posted in
- Cybersecurity

Phreaking with Class0 and MWI in 2021

Posted byby Jason Chee
August 2, 2021
6 minute read

Couldn’t think of a nice title. There used to be this thing I used to do back in 2007-2010, which was sending Class0 and Message Waiting Indicator (MWI) messages to…

0 Comments