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HSCTF 2021 - Audio Frequency | Steg
Audio Freqency What a mundane song, it’s just the same note repeated over and over. But could there perhaps be two different notes? Solution As I zoomed into their waveforms, I see two different waves, which possibly means binary. I verified that by looking at the first and last character....
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HSCTF 2021 - multidimensional | Rev
Multidimensional import java.util.Scanner; public class Multidimensional { private char[][] arr; private String mrConnolly; public Multidimensional(String s) { arr = new char[6][6]; for (int i = 0; i < s.length(); i++) { arr[i % 6][i / 6] = s.charAt(i); } mrConnolly = "hey_since_when_was_time_a_dimension?"; } public boolean check() { String s =...
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HSCTF 2021 - Hopscotch | Programming
Hopscotch Keith wants to play hopscotch, but in order to make things interesting, he decides to use a random number generator to decide the number of squares n to draw for a round of hopscotch. He then creates a hopscotch board on the floor by randomly creating a sequence of...