Secure Messaging Using Asymmetric Cryptographic Algorithm
How does Asymmetric Cryptographic Algorithm work for secure messaging?
Asymmetric cryptographic algorithm, also known as public-key cryptography, is a method of encrypting and decrypting messages using a pair of keys – a public key and a private key. This system allows for secure communication between parties without the need to share a secret key.
The steps involved in using an asymmetric cryptographic algorithm for secure messaging are as follows:
- Each user generates a pair of keys - a public key and a private key.
- Each user shares their public key with others by registering it or making it accessible.
- When a user wants to send a secure message to another user, the sender encrypts the message using the recipient's public key.
- The recipient then decrypts the message using their private key.
Which key does userB use to decrypt the message from userA?
Answer: userB will use his/her private key.
Explanation: If userA wants to send a secure message to userB using an asymmetric cryptographic algorithm, userA will encrypt the message using userB's public key. When userB receives the encrypted message, he/she will decrypt it using his/her private key. This ensures that only userB, who possesses the corresponding private key, can access the original message.
If userA wants to send a secure message to userB using an asymmetric cryptographic algorithm, which key does userB use to decrypt the message?
userB will use his/her private key.