RSA algorithm restricts encryption to maximum 501 bytes of text and does NOT work for encrypting large text file. 😤
If you want to transfer large text file using encryption and without letting anyone else read it, Here is a workaround that can help 😉
- Firstly, generate a
symmetric key, and encrypt the large text with it. - Encrypt the symmetric key using your
RSA public key. - Then, finally send encrypted text with the encrypted symmetric key.
By this way only receiver who has the private key will be able to decrypt the symmetric key and the message.