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In public key and private key cryptography, host ‘A’ has PuA and PrA, host ‘B’ has PuB and PrB as public and private keys respectively. Now, if ‘A’ wants to send a message to ‘B’ securely, which key will be used by ‘A’ for encryption ?
- a)PuA
- b)PuB
- c)PrA
- d)PrB
Correct answer is option 'B'. Can you explain this answer?
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In public key and private key cryptography, host ‘A’ has P...
If the message is encrypted using PuB, then it can be decrypted using only PrB, which will be known only to ‘B’.
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In public key and private key cryptography, host ‘A’ has P...
Key to be used for encryption:
Public key of host B (PuB)
Explanation:
Public key and private key:
In public key and private key cryptography, each host has a pair of keys - a public key (Pu) and a private key (Pr). The public key is used for encryption, while the private key is used for decryption.
Encryption process:
When host A wants to send a message to host B securely, it will use host B's public key (PuB) for encryption. This ensures that only host B, who possesses the corresponding private key (PrB), can decrypt the message.
Security:
Using the public key of host B for encryption ensures that the message is secure during transmission. Even if the message is intercepted by a third party, they will not be able to decrypt it without the private key of host B.
Conclusion:
In this scenario, host A should use the public key of host B (PuB) for encryption to send a message securely.
Public key of host B (PuB)
Explanation:
Public key and private key:
In public key and private key cryptography, each host has a pair of keys - a public key (Pu) and a private key (Pr). The public key is used for encryption, while the private key is used for decryption.
Encryption process:
When host A wants to send a message to host B securely, it will use host B's public key (PuB) for encryption. This ensures that only host B, who possesses the corresponding private key (PrB), can decrypt the message.
Security:
Using the public key of host B for encryption ensures that the message is secure during transmission. Even if the message is intercepted by a third party, they will not be able to decrypt it without the private key of host B.
Conclusion:
In this scenario, host A should use the public key of host B (PuB) for encryption to send a message securely.
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In public key and private key cryptography, host ‘A’ has PuA and PrA, host ‘B’ has PuB and PrB as public and private keys respectively. Now, if ‘A’ wants to send a message to ‘B’ securely, which key will be used by ‘A’ for encryption ?a)PuAb)PuBc)PrAd)PrBCorrect answer is option 'B'. Can you explain this answer?
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