rgbCTF-2020

CTF Writeup - https://ctf.rgbsec.xyz/

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Ye Old PRNG

I found a really old prng… can you exploit it? nc challenge.rgbsec.xyz 23456

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Picking Up The Pieces

Can you help me? I had a flag that I bought at the store, but on the way home, I dropped parts of it on some roads! Now some roads have strings of text, and I can’t tell which are part of my flag. I’m very smart and efficient (but somehow not smart or efficient enough to keep my flag), so I know that I took the fastest way from the store back to my house.

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Secure RSA

We have created the securest possible RSA algorithm! (Put your flag in the flag format.)

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Laser 1-Factoring

Do you like lasers? I like lasers! Here’s a warmup: create a program that factors the one number given as input. Output factors on one line in ascending order (or just leave them on the stack, as Laser has implicit output)

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Differences

If a difference could difference differences from differences to calculate differences, would the difference differently difference differences to difference the difference from different differences differencing?

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