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HTB Cyber Apocalypse 2021 - PhaseStream 1 | Crypto
PhaseStream 1 The aliens are trying to build a secure cipher to encrypt all our games called “PhaseStream”. They’ve heard that stream ciphers are pretty good. The aliens have learned of the XOR operation which is used to encrypt a plaintext with a key. They believe that XOR using a...
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HTB Cyber Apocalypse 2021 - Nintendo Base64 | Crypto
Nintendo Base64 Aliens are trying to cause great misery for the human race by using our own cryptographic technology to encrypt all our games. Fortunately, the aliens haven’t played CryptoHack so they’re making several noob mistakes. Therefore they’ve given us a chance to recover our games and find their flags....
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UMDCTF 2021 - Testudo's Message | Steg
Testudo’s Message My friend Testudo keeps sending me this picture and I don’t know what he is trying to tell me. Can you figure out what he is saying? You will have to wrap what you find in this challenge with UMDCTF-{} yourself before submitting Given image: Solution There are...