Why can a message encrypted with the Public Key only be decrypted with the receiver's appropriate Private Key?
1
Not true, the message can also be decrypted with the Public Key
2
A so called "one way function with back door" is applied for the encryption
3
The Public Key contains a special function which is used to encrypt the message and which can only be reversed by the appropriate Private Key
4
The encrypted message contains the function for decryption which identifies the Private Key
5
None of these