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Bob wants people to know his public key but at the same time, he wants no one to accept a forged key as his. He decides to create a public key certificate. He goes to Certificate Authority(CA) where CA asks for Bob’s ______ key and signs the certificate with his _______ key.
  • a)
    Public key, private key
  • b)
    Public key, public key
  • c)
    Private key, public key
  • d)
    Private key, private key
Correct answer is option 'A'. Can you explain this answer?
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Bob wants people to know his public key but at the same time, he wants...
CA is a federal or state organization that binds a public key to an entity and issues a certificate. The CA has a well-known public key itself that cannot be forged. The CA checks Bob's identification. It then asks for Bob's public key and writes it on the certificate. To prevent the certificate itself from being forged, the CA signs the certificate with its private key.
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Bob wants people to know his public key but at the same time, he wants...
To provide his identity information and his public key. Bob provides his identity information, such as his name, address, and contact details, along with his public key.

The CA then verifies Bob's identity by checking his provided information against trusted sources, such as government databases or official documents. Once the CA is satisfied with Bob's identity, they generate a digital certificate.

The digital certificate includes Bob's public key and his identity information. Additionally, it is digitally signed by the CA using the CA's private key. This digital signature ensures the integrity and authenticity of the certificate.

Bob can now distribute this public key certificate to others, allowing them to verify his identity and authenticate his public key. When someone receives the certificate, they can verify its authenticity by checking the CA's digital signature using the CA's public key, which is widely trusted.

If someone attempts to forge a key claiming to be Bob, the digital signature on the forged certificate will not match the CA's public key, thus indicating that it is not a valid certificate. This helps prevent others from accepting a forged key as Bob's.

In summary, by creating a public key certificate and getting it signed by a trusted CA, Bob can ensure that his public key is associated with his verified identity and protect against the acceptance of forged keys.
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Bob wants people to know his public key but at the same time, he wants no one to accept a forged key as his. He decides to create a public key certificate. He goes to Certificate Authority(CA) where CA asks for Bob’s ______ key and signs the certificate with his _______ key.a)Public key, private keyb)Public key, public keyc)Private key, public keyd)Private key, private keyCorrect answer is option 'A'. Can you explain this answer?
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