When a user attempts to open an email using a company-issued smartphone, the user receives a message stating the email is encrypted and cannot be opened. The user forwards the email to a personal account and receives the same message. The user then contacts the IT department for assistance. The technician instructs the user to contact the sender to exchange information in order to decode the message. Which of the following will the user receive from the sender?

A token is often used for authentication or authorization purposes rather than for decrypting encrypted messages. While tokens can play a role in securing access to systems or applications, they are not typically used to decode email content. Thus, a token would not help the user in this situation.

A password is primarily a form of user authentication and does not serve the purpose of decrypting an encrypted email. While passwords are crucial for logging into accounts or systems, they do not provide the necessary keys to access encrypted message content. Consequently, a password would not resolve the issue at hand.

A Root Certificate Authority (CA) is involved in managing digital certificates and establishing trust within a network but does not provide the means to decrypt an email. The Root CA's role is to ensure secure communications but does not directly relate to the decryption of specific messages. Therefore, it would not be useful for the user to receive from the sender.