Have you ever played a secret code game with your friends where one person picks a secret code and the others have to try to guess it? That's kind of like what integral cryptanalysis is all about! Except instead of playing with friends, it's about trying to figure out secret codes that people use to send messages online.
Sometimes, people use really complicated secret codes to keep their messages safe from people who aren't supposed to see them. But even really complicated secret codes can be broken if you know the right tricks!
To break a secret code using integral cryptanalysis, you have to look at lots and lots of messages that have been coded using the same secret code. By looking at lots of different messages that all use the same secret code, you can start to see patterns in the way the code works.
Once you start to see patterns in the way the code works, you can use those patterns to figure out what the secret code actually is! It's kind of like if you were playing that secret code game with your friends, and you noticed that every time your friend used the letter "L," they also used the letter "M." You might start to guess that "M" actually stands for "L" in your friend's secret code!
But remember, breaking a secret code using integral cryptanalysis is kind of like a game too, and the people who make these secret codes are really smart. So you have to be smart too and use lots of tricks and tools to figure it out! But it's definitely a lot of fun, especially if you love solving puzzles and cracking codes!