On the Cipher Switch, which are the valid modes?

On the Cipher Switch, which are the valid modes?

• A. PT, LD, and CT
• B. PT, LD, and EN
• C. PT, CT, and LD
• D. PT, LD, and RX

Answer: (A)

The Cipher Switch is designed to reflect the data state as it moves through the cipher process. The three valid modes correspond to how data is being handled: plain text before encryption, the data being loaded into or prepared for the cipher, and the cipher text after encryption. In other words, you switch among seeing or feeding data as plaintext, loading data into the cipher (loading the next block or packet), or viewing/handling the encrypted output. Those are the only states the switch is meant to represent, which is why PT (plain text), LD (load data), and CT (cipher text) are the valid options. The other terms describe broader device functions (like enabling encryption or receiving data) that aren’t controlled by this cipher-specific switch, so they aren’t valid modes.

The Cipher Switch is designed to reflect the data state as it moves through the cipher process. The three valid modes correspond to how data is being handled: plain text before encryption, the data being loaded into or prepared for the cipher, and the cipher text after encryption. In other words, you switch among seeing or feeding data as plaintext, loading data into the cipher (loading the next block or packet), or viewing/handling the encrypted output. Those are the only states the switch is meant to represent, which is why PT (plain text), LD (load data), and CT (cipher text) are the valid options. The other terms describe broader device functions (like enabling encryption or receiving data) that aren’t controlled by this cipher-specific switch, so they aren’t valid modes.