Doing some research about cryptography, I've read many times that, when using RSA 1024 and PKCS#1, the size of the payload cannot be bigger than 117 bytes.
This payload cannot be bigger than the modulus size, which is the key size in bits / 8 (1024/8 = 128 - bytesFromPKCS1 = 117).
But why does this limitation exist? Is it in the formula? if so, why?
Thanks for the answer :)