| Country |  Taiwan |
| Grade | Regular user |
| Ranking | 107 |
| Points | 352 / 1689 (20.84%) |
| Challenges | 33 / 98 (33.67%) |
| Website | https://david942j.blogspot.tw/ |
Crypto – loading...
Forensics – loading...
Misc – loading...
Pwning – loading...
Reversing – loading...
Web – loading...| Registration | |
| Last activity | Never |
| Last solve | Never |
| W3Challs | Send a private message |
| david942j[at]gmail[dot]com |