7. Suppose Bob disappeared after sending an encrypted message, C, to Alice, but erroneously Bob had used Oscar's public key instead of Alice's. Since Alice can't reach Bob to resend the message, she need to request Oscar either to share his private key or decrypt and send the message. Unfortunately Oscar doesn't agree to share his private key nor does Alice want to disclose message content to Oscar. Assuming that RSA is the cipher in used, suggest a cryptographic method to decrypt the message satisfy their interest (of course involving both Alice and Oscar) and verify its correctness. (15 points) C=E(e,P)=PemodnWhere:e=publickeyofOscar (Hint: Alice can send wisely modified version of C=Pemodn to hide it from Oscar)