Introduction

Beginner's Tutorial

System Encryption

 Supported Systems

 Hidden Operating System

 Rescue Disk

Plausible Deniability

 Hidden Volume

  Protection of Hidden Vol.

  Security Requirements

 Hidden Operating System

Parallelization

Pipelining

Hardware Acceleration

Encryption Algorithms

 AES

 Serpent

 Twofish

 Cascades

Hash Algorithms

 RIPEMD-160

 SHA-512

 Whirlpool

Technical Details

 Notation

 Encryption Scheme

 Modes of Operation

 Header Key Derivation

 Random Number Gen.

 Keyfiles

 Volume Format Spec.

 Standards Compliance

 Source Code

TrueCrypt Volume

 Creating New Volumes

 Favorite Volumes

 System Favorite Volumes

Main Program Window

 Program Menu

 Mounting Volumes

Supported Systems

Portable Mode

Keyfiles

Tokens & Smart Cards

Language Packs

Hot Keys

Security Model

Security Requirements

 Data Leaks

  Paging File

  Hibernation File

  Memory Dump Files

 Unencrypted Data in RAM

 Physical Security

 Malware

 Multi-User Environment

 Authenticity and Integrity

 New Passwords & Keyfiles

 Password/Keyfile Change

 Trim Operation

 Wear-Leveling

 Reallocated Sectors

 Defragmenting

 Journaling File Systems

 Volume Clones

 Additional Requirements

Command Line Usage

Backing Up Securely

Miscellaneous

 Use Without Admin Rights

 Sharing over Network

 Background Task

 Removable Medium Vol.

 TrueCrypt System Files

 Removing Encryption

 Uninstalling TrueCrypt

 Digital Signatures

Troubleshooting

Incompatibilities

Issues and Limitations

License

Future Development

Acknowledgements

Version History

References

   

Parallelization Search

Disclaimers





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Parallelization

When your computer has a multi-core processor (or multiple processors), TrueCrypt uses all of the cores (or processors) in parallel for encryption and decryption. For example, when TrueCrypt is to decrypt a chunk of data, it first splits the chunk into several smaller pieces. The number of the pieces is equal to the number of the cores (or processors). Then, all of the pieces are decrypted in parallel (piece 1 is decrypted by thread 1, piece 2 is decrypted by thread 2, etc). The same method is used for encryption.

So if your computer has, for example, a quad-core processor, then encryption and decryption are four times faster than on a single-core processor with equivalent specifications (likewise, they are twice faster on dual-core processors, etc).

Increase in encryption/decryption speed is directly proportional to the number of cores and/or processors.

Note: Processors with the Hyper-Threading technology provide multiple logical cores per one physical core (or multiple logical processors per one physical processor). When Hyper Threading is enabled in the computer firmware (e.g. BIOS) settings, TrueCrypt creates one thread for each logical core/processor. For example, on a 6-core processor that provides two logical cores per one physical core, TrueCrypt uses 12 threads.


When your computer has a multi-core processor/CPU (or multiple processors/CPUs), header key derivation is parallelized too. As a result, mounting of a volume is several times faster on a multi-core processor (or multi-processor computer) than on a single-core processor (or a single-processor computer) with equivalent specifications.


Note: Parallelization was introduced in TrueCrypt 6.0.





  See also: Pipelining,  Hardware Acceleration


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