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A sender is employing public key cryptography to send a secret message to a receiver. Which one of the following statements is TRUE?
  • a)
    Sender encrypts using receiver’s public key
  • b)
    Sender encrypts using his own public key
  • c)
    Receiver decrypts using sender’s public key
  • d)
    Receiver decrypts using his own public key
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
A sender is employing public key cryptography to send a secret message...

in public key cryptography if sender uses receiver’s public key for encryption then the decryption of message is possible only by using private key of receiver.
Hence 1st is true and remaining are false.
If sender encrypts using his receiver public key then no one except the receiver can decrypt it since only receiver knows his private key no one else.
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Most Upvoted Answer
A sender is employing public key cryptography to send a secret message...
's private key
b)Receiver decrypts using sender's public key
c)Sender encrypts using receiver's public key
d)Receiver decrypts using sender's private key

c)Sender encrypts using receiver's public key. This is because in public key cryptography, the receiver's public key is used for encryption and the receiver's private key is used for decryption. The sender cannot encrypt using the receiver's private key as it is kept secret by the receiver.
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A sender is employing public key cryptography to send a secret message to a receiver. Which one of the following statements is TRUE?a)Sender encrypts using receiver’s public keyb)Sender encrypts using his own public keyc)Receiver decrypts using sender’s public keyd)Receiver decrypts using his own public keyCorrect answer is option 'A'. Can you explain this answer?
Question Description
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