Private set intersection
Private set intersection is when two people have some secret information that they don't want to share with each other, but they still need to figure out if there is any information that they both have in common. So imagine you and your friend have some stickers, and you both want to know if you have any of the same stickers without telling each other which stickers you have.
First, you both write down a list of all the stickers you have, but you keep your list a secret from your friend. Then, you both follow a special set of instructions called a cryptographic protocol, which is like a secret code that only you and your friend can understand. This secret code lets you compare your lists of stickers without actually revealing what stickers you have.
Through this process, you can find out if there are any stickers that you both have, but you don't have to tell your friend which specific stickers you have. This is useful if you have private or sensitive information that you need to compare with someone else, but you don't want to reveal that information.
First, you both write down a list of all the stickers you have, but you keep your list a secret from your friend. Then, you both follow a special set of instructions called a cryptographic protocol, which is like a secret code that only you and your friend can understand. This secret code lets you compare your lists of stickers without actually revealing what stickers you have.
Through this process, you can find out if there are any stickers that you both have, but you don't have to tell your friend which specific stickers you have. This is useful if you have private or sensitive information that you need to compare with someone else, but you don't want to reveal that information.