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Before GRIMMCON
GRIMMCON, April 14, 2020
Before DERPCON
DERPCON
July 2020
HOPE 2020
July 2021
TX WC 2021

COBOL CTF

Party Like It's 1959!

with Sam Bowne, Elizabeth Biddlecome,
Irvin Lemus and Kaitlyn Handelman

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Challenges
ED 200: Google Cloud Linux Server	15
CBL 1: Basic COBOL	160
CBL 2: String Handling	50
CBL 3: File I/O	25
CBL 4: Tables	110
CBL 5: Subroutines	30
CBL 6: ASCII and Modular Arithmetic	60
CBL 7: RSA Encryption	170
CBL 8: IBM i Server	30
CBL 9: IBM Rational Developer for i	20

Technical References
COBOL Tutorial from JavaTPoint
COBOL Tutorial from TutorialsPoint
GnuCOBOL Manual
GnuCOBOL Sample Programs
GNU COBOL 2.0 Programmer's Guide (PDF)
COBOL - SUBROUTINES
Free IBM COBOL course

Cultural References
COBOL-coding volunteers sought
95% of ATM swipes rely on COBOL
Banks scramble to fix old systems
Our Government Runs on COBOL
Is Java the next COBOL?L

Testimonials

Dear God
What the hell is wrong
with you people, COBOL
I am going to have to
check it out LOL
Boss: What do you think of COBOL?
Me: Fuck COBOL, its why checks
take 3 days to clear the bank.
Boss: Wanna learn COBOL for a CTF?
Me: Hell yes!
Lol cobol CTF? That's like participating
in a CTF that's written in Swahili bro

This was a great way to learn why
I never want to do any actual
COBOL work.