True or False: To encrypt an email using PKI, you need a Common Access Card (CAC) and a CAC reader.

To encrypt an email using Public Key Infrastructure (PKI), having a Common Access Card (CAC) and a CAC reader is indeed necessary. The CAC serves as a secure means of identification for individuals within the military and certain government sectors, allowing users to access encrypted communication securely. The card contains cryptographic keys that are essential for encryption and decryption processes.

In environments where security is paramount, such as military settings, the CAC provides not just authentication but also enables the user to digitally sign documents or encrypt emails to ensure confidentiality. The CAC reader, which typically connects to a computer, enables the use of the CAC for signing or encrypting data.

Therefore, stating that you need a CAC and a CAC reader to encrypt emails with PKI is accurate, particularly in contexts where secure communication is critical.