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  • 14 References 4 Confirmed & Positive
  • Fluent in English, Portuguese, Spanish; learning Dutch, German, Russian
  • 34, Male
  • Member since 2010
  • Internet Security Officer.
  • University at this moment.
  • From Campos dos Goytacazes.
  • Profile 100% complete

About Me


Learn and teach.


Hallo, wie geht es dir?

Ich heiße Oscar Marques.


Здравствуйте, Как поживаешь?

Mеня зоbут оскар маряес.


I'm especially interested in vulnerabilities analysis and developing.

I also study this topics not related to computers:

- History, weapons, military systems and tatics, radio communication, planes, hunting, camping, music, religions, languages.

I have some language skills, I speak portuguese, english and spanish. Now I'm studying german, dutch and russian.
I hope to learn arabian, chinese, japanese, french, italian, swedish, norwegian, finnish, turkish and greek someday.

I'm trying to play music, trying to boost some sounds out of my flutes. I like black and folk metal, andean music, classical.

I like some games: chess, AA, ET Wolfenstein, Battlefield. If you want to have my nickname just let me know.

I 'm a crazy coder, smart sysadmin, dangerous and insane guy but I can love you...

Why I’m on Couchsurfing


I went to a CS meeting in Mercadinho, Laranjeiras - Rio de Janeiro - Brazil.


Meeting foreign people to learn more about their country, culture etc..


- *nix, networking, vulnerability analysis and research, compilers, debuggers, security, os dev, cryptology, forensic, secure coding, rfid, gsm, lock picking, satcom, usrp, malwares, cameras, telecom, espionage, phone phreaking, smartcard, reverse engineering, eletronic warfare, privacy, counter measures, hardware and software hacking, embedded systems.

  • culture
  • chess
  • coding
  • music
  • camping
  • hunting
  • teaching
  • engineering
  • history
  • languages
  • religion
  • software

Teach, Learn, Share

I was teacher for a long time. Now I work with CompSec.

Old School Badges

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