IJCTF 2020

Description Three hidden keys open three secret gates Wherein the errant will be tested for worthy traits And those with the skill to survive these straits Will reach The End where the prize awaits Flag is in form IJCTF{copper key + jade key + crystal key} Author: Harsh Hint The first clue is hidden on the website … File names and titles are useful Solution All this challenge is a reference to the film Ready player one as we can see in the description of the challenge. We used this information to our advantage. ...

Description Patience is the Key! Lookup therealbobo@home ijctf/rev1 (master*) $ file main main: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux.so.2, stripped therealbobo@home therealbobo@home ijctf/rev1 (master*) $ ./main _________ .____ .__ / _____/ ____ ____ __ _________ ____ | | ____ ____ |__| ____ \_____ \_/ __ \_/ ___\| | \_ __ \_/ __ \ | | / _ \ / ___\| |/ \ / \ ___/\ \___| | /| | \/\ ___/ | |__( <_> ) /_/ > | | \ /_______ /\___ >\___ >____/ |__| \___ > |_______ \____/\___ /|__|___| / \/ \/ \/ \/ \/ /_____/ \/ Login: AAAAAAA !!!INTRUDER ALERT!!! Solution First of all I opened ‘main’ in radare2: ...

Description Damn this weird boss. He doesn't let me use keys longer than 2 characters? How am i supposed to make anything secure with 2 byte keys? I know i know, i'll just encrypt everything 4 times with different keys, so its 8 characters! Im a genius! Here is your message: NeNpX4+pu2elWP+R2VK78Dp0gbCZPeROsfsuWY1Knm85/4BPwpBNmClPjc3xA284 And here is your flag: N2YxBndWO0qd8EwVeZYDVNYTaCzcI7jq7Zc3wRzrlyUdBEzbAx997zAOZi/bLinVj3bKfOniRzmjPgLsygzVzA== Author: Ignis In this crypto challenge, we were given a python script containing an AES CBC implementation that used only 2 bytes of security for each key. ...

Description We locked our secret box, You can directly ping the bot (@Vault #8895 ) using “start” to get the secret but we don’t know the door code we used random() also we used sleep(10). shift register… Author : Harsh and warlock_rootx Hint if pin in user_input(): Solution We started to talk with the discord bot (start): Time to test your lock picking skills I AM _ _ _ _ _ _ _ LOCKED [ 0 ] [ 1 ] We guessed that the vault password was seven character long and contained only 0 and 1. ...