17 Security

Multiple Choice

when two different keys are used

• Symmetric key encryption

• Asymmetric encryption

• Public key

• Cryptography

Open Ended

Give two similarities of private and public key

Open Ended

Give two differences between private and public key

​Answer

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Open Ended

State two drawbacks of using symmetric key encryption

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Open Ended

Name two data items present in a digital certificate

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Open Ended

Name two uses where encrypted message digests are advisable

​Message digest uses

Financial transaction

Legal documents

Software distribution​

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Open Ended

Give similarities between digital certificate and digital signature

Open Ended

Give differences between digital certificate and digital signature

​Answer

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Open Ended

A customer downloads a new educational software package from the company.

Explain how the customer's and the company's computer use a hashing algorithm to assure the customer that:

the software has come from the company and

no one has altered it.

​Answer

Open Ended

Julio is buying items from the online shop. He already has an account with the shop.

Explain how the use of SSL or TLS helps to keep Julio' confidential information secure

​Answer

Open Ended

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​Answer

Open Ended

State two drawbacks of using quantum cryptography