A hospital must retire a server that stored encrypted patient records. The storage media will be physically reused in another department. The hospital wants to ensure the data is unrecoverable without destroying the hardware. What is the most efficient method to achieve this?

Degauss the hard drive to disrupt the magnetic fields.

Overwrite the entire disk with zeros using a disk-wiping utility.

Format the drive with a quick format and reinstall the operating system.

Delete the encryption keys used to encrypt the patient records.

A law firm sends settlement agreements to clients via email. A client disputes the terms, claiming the document was altered after signing. The firm needs to prove that the document was signed by the client and has not been modified. Which cryptographic technique should the firm use?

Compute a SHA-256 hash of the document and email it separately.

Encrypt the document with the client's public key before sending it.

Create a digital signature using the client's private key and attach it to the document.

Send the document through a secure file transfer protocol (SFTP) with a password.

A company uses full-disk encryption on all laptops. An employee leaves the company, and the laptop must be reassigned to a new employee. The company wants to ensure the previous employee's data is unrecoverable while keeping the laptop functional. What is the most efficient method?

Overwrite the drive with a single pass of random data.

Format the drive with a quick format and reinstall the operating system.

Remove the hard drive and physically destroy it.

Perform a cryptographic erase by deleting the full-disk encryption key and reinitializing the drive.

A company encrypts its backup tapes with AES-256. The encryption keys are stored in a hardware security module (HSM). The company must dispose of the tapes but wants to reuse them for non-sensitive data. The tapes are still physically functional. What is the most secure and efficient method to prepare the tapes for reuse?

Shred the tapes to physically destroy the media.

Overwrite the tapes with a single pass of zeros.

Perform a cryptographic erase by deleting the encryption keys from the HSM.

Degauss the tapes to erase all magnetic data.

CompTIASecurityX (CASP+)

Domain 3Objective 5

Cryptographic Techniques CAS-005 Practice Questions (Page 1)

Part of the Security engineering domain, which accounts for 31% of the CAS-005 exam. CompTIA does not publish an official question count, but from its 165-minute exam (~65–110 total, ~20–34 in this domain), expect 4–7 from this objective — we provide 26 practice questions to prepare you well beyond it. (estimate)

26questions here

6free pages

7concepts

31%of the exam

Questions 1–5

1foundation · easy
A software vendor wants to assure customers that a downloaded application has not been tampered with and was indeed published by the vendor. Which cryptographic technique should the vendor use to sign the application?
Select an answer first
2application · medium
A hospital must retire a server that stored encrypted patient records. The storage media will be physically reused in another department. The hospital wants to ensure the data is unrecoverable without destroying the hardware. What is the most efficient method to achieve this?
Select an answer first
3application · medium
A law firm sends settlement agreements to clients via email. A client disputes the terms, claiming the document was altered after signing. The firm needs to prove that the document was signed by the client and has not been modified. Which cryptographic technique should the firm use?
Select an answer first
4expert · hard
A company uses full-disk encryption on all laptops. An employee leaves the company, and the laptop must be reassigned to a new employee. The company wants to ensure the previous employee's data is unrecoverable while keeping the laptop functional. What is the most efficient method?
Select an answer first
5expert · hard
A company encrypts its backup tapes with AES-256. The encryption keys are stored in a hardware security module (HSM). The company must dispose of the tapes but wants to reuse them for non-sensitive data. The tapes are still physically functional. What is the most secure and efficient method to prepare the tapes for reuse?
Select an answer first

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Cryptographic Techniques CAS-005 Practice Questions (Page 1)

Questions 1–5

A software vendor wants to assure customers that a downloaded application has not been tampered with and was indeed published by the vendor. Which cryptographic technique should the vendor use to sign the application?

A hospital must retire a server that stored encrypted patient records. The storage media will be physically reused in another department. The hospital wants to ensure the data is unrecoverable without destroying the hardware. What is the most efficient method to achieve this?

A law firm sends settlement agreements to clients via email. A client disputes the terms, claiming the document was altered after signing. The firm needs to prove that the document was signed by the client and has not been modified. Which cryptographic technique should the firm use?

A company uses full-disk encryption on all laptops. An employee leaves the company, and the laptop must be reassigned to a new employee. The company wants to ensure the previous employee's data is unrecoverable while keeping the laptop functional. What is the most efficient method?

Keep studying — Security engineering