Is it possible to find out which public key was used to generate the message?
Scenario is like this :
I got data which is encrypted with a public key. Now a "bad guy" hast the encrypted data, and knows the decrypted content and wants to know who was the receiver of the data. The "bad guy" has all possible public keys which could have been used to encrypt the data.
Is it possible for the "bad guy" to find out who was the receiver(or witch public key was used).
Thanks a lot.