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Questions and Answers
What does BitLocker To Go primarily encrypt?
What does BitLocker To Go primarily encrypt?
What must you provide when initializing BitLocker To Go on a device?
What must you provide when initializing BitLocker To Go on a device?
Why can't TPM encryption mode be used with BitLocker To Go?
Why can't TPM encryption mode be used with BitLocker To Go?
Which file systems can BitLocker To Go encrypt?
Which file systems can BitLocker To Go encrypt?
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What happens after a removable device is encrypted with BitLocker To Go?
What happens after a removable device is encrypted with BitLocker To Go?
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What is the primary objective of system and OS security?
What is the primary objective of system and OS security?
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Which type of encryption is focused on securing data at the file, folder, and volume levels?
Which type of encryption is focused on securing data at the file, folder, and volume levels?
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What does the Trusted Platform Module (TPM) primarily enhance?
What does the Trusted Platform Module (TPM) primarily enhance?
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What method can be used for data encryption that involves two keys?
What method can be used for data encryption that involves two keys?
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Why might access control be implemented without encryption?
Why might access control be implemented without encryption?
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File system security primarily involves which of the following?
File system security primarily involves which of the following?
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Which of the following is NOT a benefit of private and public key encryption?
Which of the following is NOT a benefit of private and public key encryption?
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In the context of system and OS security, what is a significant aspect of securing data?
In the context of system and OS security, what is a significant aspect of securing data?
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What is a major risk of using single file encryption?
What is a major risk of using single file encryption?
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Why should EFS not be used for single file encryption, especially for sensitive data?
Why should EFS not be used for single file encryption, especially for sensitive data?
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How is the encryption key generated in Encrypting File System (EFS)?
How is the encryption key generated in Encrypting File System (EFS)?
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What happens if a user's password is changed while using EFS?
What happens if a user's password is changed while using EFS?
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What is recommended when dealing with files containing sensitive data?
What is recommended when dealing with files containing sensitive data?
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What is one of the functions of Encrypting File System (EFS)?
What is one of the functions of Encrypting File System (EFS)?
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What occurs when a file is encrypted using EFS and then deleted?
What occurs when a file is encrypted using EFS and then deleted?
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Which of the following statements about EFS is true?
Which of the following statements about EFS is true?
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What is the main purpose of the Trusted Platform Module (TPM)?
What is the main purpose of the Trusted Platform Module (TPM)?
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Which standard is TPM also known as?
Which standard is TPM also known as?
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How does TPM ensure a secure boot process?
How does TPM ensure a secure boot process?
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What role do the Platform Configuration Registers (PCRs) play in TPM?
What role do the Platform Configuration Registers (PCRs) play in TPM?
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Which of the following describe TPM's cryptographic operations?
Which of the following describe TPM's cryptographic operations?
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What happens if changes are detected in previous configurations according to TPM?
What happens if changes are detected in previous configurations according to TPM?
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What type of device does TPM refer to?
What type of device does TPM refer to?
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Which process is NOT covered by the role of TPM?
Which process is NOT covered by the role of TPM?
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What is a requirement for files to remain accessible in the Encrypting File System (EFS)?
What is a requirement for files to remain accessible in the Encrypting File System (EFS)?
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What does a user need to do to use EFS effectively?
What does a user need to do to use EFS effectively?
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What could be a potential security risk when using EFS?
What could be a potential security risk when using EFS?
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What happens to encrypted files if the password is changed or removed incorrectly?
What happens to encrypted files if the password is changed or removed incorrectly?
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Which action is NOT advisable when using EFS?
Which action is NOT advisable when using EFS?
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EFS primarily aims to protect which of the following?
EFS primarily aims to protect which of the following?
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What is an essential factor to maintain when managing encrypted files?
What is an essential factor to maintain when managing encrypted files?
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What is the recommended practice for encrypting files to enhance security?
What is the recommended practice for encrypting files to enhance security?
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What should be done with recovery information for EFS or BitLocker?
What should be done with recovery information for EFS or BitLocker?
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What is NOT a recommended practice when using BitLocker To Go?
What is NOT a recommended practice when using BitLocker To Go?
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What is the primary purpose of using encryption for folders?
What is the primary purpose of using encryption for folders?
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Which of the following is a critical step to prevent OS bypassing on a computer?
Which of the following is a critical step to prevent OS bypassing on a computer?
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Why should EFS or BitLocker recovery information be stored separately?
Why should EFS or BitLocker recovery information be stored separately?
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When is it inappropriate to use TPM for storing encryption keys?
When is it inappropriate to use TPM for storing encryption keys?
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What is a common misunderstanding about file encryption?
What is a common misunderstanding about file encryption?
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Study Notes
File System Security
- File system security protects data stored on computers.
- Protecting system and user data is the primary objective.
- Security methods include file, folder, and volume level encryption.
- Key encryptions include private and public key encryption.
- Trusted Platform Modules (TPMs) are important for protection.
Securing File Systems
- Key security concepts include firewalls for limited open ports and access controls.
- Encryption is employed to safeguard data.
- Offline attacks involve using alternative boot disks and operating systems.
- Effective access control mechanisms are crucial to prevent unauthorized access.
- Encryption for access control addresses vulnerabilities.
- Encryption protects files, folders, and volumes against unauthorized access.
- Windows stores decryption keys.
Encryption for Access Control
- Attackers can bypass host operating systems to exploit access control mechanisms.
- Offline attacks involve using alternative boot disks and operating systems.
Encryption Algorithms
- Symmetric encryption uses the same key for encryption and decryption.
- Asymmetric encryption employs separate keys (public and private).
- Symmetric encryption is faster.
Safeguarding Stored Data
- BitLocker to Go and Encrypting File System (EFS) are used for storage security.
- BitLocker uses encryption for file systems and drives.
- EFS protects files while BitLocker encrypts the entire device or volume.
Encrypting File System (EFS)
- EFS only works on NTFS file systems.
- EFS uses private/symmetric key encryption, enhancing speed.
- The encryption key is encrypted with the user's public key.
- Files become inaccessible if the password is lost or changed improperly.
- There are ways to recover encrypted passwords or change them except through Windows if known.
- Graphic diagram illustrating the encryption cycle for files.
Potential Security Risks with EFS
- Single file encryption poses security risks.
- Utilities can be used to recover deleted files if data hasn't been overwritten.
Avoiding Dangers of Using EFS(Encrypting File System)
- Avoid single file encryption for sensitive data.
- Always use folder encryption instead.
- Maintain separate recovery information securely.
- Avoid using TPM for encryption keys in concurrent (BitLocker To Go) scenarios.
BitLocker (Volume/Drive Encryption)
- BitLocker is a more modern encryption method.
- Windows Vista first introduced it in the Ultimate and Enterprise editions.
- BitLocker offers two options for volume settings: on or off.
- Selective file/folder encryption isn’t possible with BitLocker.
BitLocker Authentication Modes
- TPM-only encryption offers automatic user authentication.
- Using PINs or USB keys further strengthens authentication.
- Several modes cater to varying user authentication needs.
BitLocker and EFS Comparison
- BitLocker encrypts all files, while EFS encrypts only selected files.
- BitLocker settings are volume-based (on/off), whereas EFS operations are file-based and customizable.
- TPM or USB key authentication accompanies BitLocker but not EFS.
BitLocker To Go
- BitLocker To Go extends drive encryption to removable storage media.
- BitLocker To Go can encrypt USB flash drives, SD cards, external HDDs, and other drives.
- The user is prompted to enter a password or smart card during encryption initiation.
- TPM encryption mode is not part of BitLocker To Go; keys are stored elsewhere for better security.
Trusted Platform Module (TPM)
- TPM is an international standard for secure crypto-processors.
- A TPM chip is a secure cryptographic processor for hardware-based security operations.
- It handles platform integrity throughout the booting process.
- TPM utilizes Platform Configuration Registers (PCRs) for secure metering and storage.
- PCR values change with BIOS/bootloader code modifications.
- TPM cannot reveal the VMK if the code is modified.
Potential Risk of Hacking TPM
- A security vulnerability exists in retrieving the Volume Master Key from the TPM.
- Retrieving this key allows unauthorized decryption.
- Hard-wiring and sniffing communications on the LPC bus can compromise the VMK, requiring physical access to the device.
Summary of Key File System Security
- Prevent OS bypassing during file security.
- Always encrypt folders instead of individual files.
- Securely store EFS and BitLocker recovery information.
- Avoid using TPM solutions for BitLocker To Go encryption.
References
- Michael J. Soloman, Security Strategies in Windows Platforms and Applications, 2nd Edition, 2013, ISBN: 978-1284031652
- Encrypting File System - Wikipedia
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Description
Test your knowledge on data encryption methods, specifically focusing on BitLocker To Go, Trusted Platform Module (TPM), and file system security. This quiz covers important aspects of system and OS security as well as key encryption concepts. Challenge your understanding of how these technologies protect data.
