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Multiple choice
What is an advantage of a double key system like pgp?
| 1. | It’s generally faster than a single key encryption system. | |
| 2. | The encrypted messages are shorter than if you use a single key system. | |
| 3. | There is no need to transfer a secret key between people. | |
| 4. | If you forget one key, you can use the other. |
Expert Answer
Q : What is an advantage of a double key system like pgp?
Ans :option 3 – There is no need to transfer a secret key between people.
Why because,
- PGP stands for “Pretty Good Privacy. It is used for sending encrypted messages between two people.
- PGP works by encrypting a message using a public key that’s tied to a specific user, when that user receives the message, they use a private key that’s known only to them to decrypt it.
- The Double key system like PGP (Pretty Good Privacy) uses a combination of symmetric -key encryption and public-key encryption
- User encrypts the message using a short key which is inturn encrpted by his public key
- The entire message (main msg + short key) is sent to the receiverv, who decrypts it using his private key
- There are two modes of using PGP: asymmetric (public key, with a private key to decrypt), and symmetric.
