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Message Integrity in Network Security

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Questions and Answers

What is the primary purpose of hashing in the context of network security?

To encrypt data in transit
To create a digital signature
To decrypt data
To verify the authenticity of data (correct)

What is the main concern in the public key problem?

Generating a secure private key
Ensuring the confidentiality of a message
Creating a digital signature
Verifying the authenticity of a public key (correct)

What is the role of a Certification Authority (CA) in public key certification?

To generate a pair of public and private keys
To encrypt a message using a digital signature
To bind a public key to a particular entity (correct)
To verify the integrity of a digitally signed message

What is the 'avalanche effect' in the context of digital signatures?

A small change in the message that results in a significant change in the hash value (D) Signup and view all the answers

What is the primary difference between encryption and hashing?

Encryption is a two-way function, while hashing is a one-way function (C) Signup and view all the answers

What is the purpose of a digital signature?

To verify the integrity and authenticity of a message (A) Signup and view all the answers

What is the role of Bob's private key in creating a digital signature?

To encrypt the message digest (A) Signup and view all the answers

What is the purpose of a certificate created by a Certification Authority (CA)?

To verify the authenticity of a public key (A) Signup and view all the answers

What is the relationship between a Certification Authority (CA) and an entity's public key?

The CA binds the entity's public key to the entity's identity (B) Signup and view all the answers

What is the primary difference between a digital signature and a MAC (Message Authentication Code)?

A digital signature uses a public key, while a MAC uses a shared secret key (C) Signup and view all the answers

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