Answer:
userB will use his/her private key.
Explanation:
The steps involved in using asymmetric cryptographic algorithm are as follow:
1. Each user generates a pair of keys to be used for the encryption and decryption of messages.
2. Each user places one of the two keys in a public register or other accessible file. This is the public key. The companion key is kept private.
3. If UserA wishes to send a confidential message to UserB, UserA encrypts the message using UserB's public key.
4. When UserB receives the message, she decrypts it using her private key.
The answer would be Skype
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A
joystick is less likely to be used while creating this presentation. Obviously, If your intention is to create an audio-visual presentation on animated movies, a computer should be used. With a computer, comes a keyboard, a mouse and a microphone as well.
A Joystick is used to control video games and play simulator games. Therefore, I do not see the need of using a joystick in this situation.
