
	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

Incompatibilities

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Incompatibilities

Activation of Adobe Photoshop® and Other Products Using FLEXnet Publisher® / SafeCast

Note: The issue described below does not affect you if you use TrueCrypt 5.1 or later and a non-cascade encryption algorithm (i.e., AES, Serpent, or Twofish).* The issue also does not affect you if you do not use system encryption (pre-boot authentication).

Acresso FLEXnet Publisher activation software, formerly Macrovision SafeCast, (used for activation of third-party software, such as Adobe Photoshop) writes data to the first drive track. If this happens when your system partition/drive is encrypted by TrueCrypt, a portion of the TrueCrypt Boot Loader will be damaged and you will not be able to start Windows. In that case, please use your TrueCrypt Rescue Disk to regain access to your system. There are two ways to do so:

You may keep the third-party software activated but you will need to boot your system from the TrueCrypt Rescue Disk CD/DVD every time. Just insert your Rescue Disk into your CD/DVD drive and then enter your password in the Rescue Disk screen.
If you do not want to boot your system from the TrueCrypt Rescue Disk CD/DVD every time, you can restore the TrueCrypt Boot Loader on the system drive. To do so, in the Rescue Disk screen, select Repair Options > Restore TrueCrypt Boot Loader. However, note that this will deactivate the third-party software.

For information on how to use your TrueCrypt Rescue Disk, please see the chapter TrueCrypt Rescue Disk.

Possible permanent solution: Upgrade to TrueCrypt 5.1 or later, decrypt the system partition/drive, and then re-encrypt it using a non-cascade encryption algorithm (i.e., AES, Serpent, or Twofish).*

Please note that this not a bug in TrueCrypt (the issue is caused by inappropriate design of the third-party activation software).

* The reason is that the TrueCrypt Boot Loader is smaller than the one used for cascades of ciphers and, therefore, there is enough space in the first drive track for a backup of the TrueCrypt Boot Loader. Hence, whenever the TrueCrypt Boot Loader is damaged, its backup copy is run automatically instead.

See also: Known Issues & Limitations, Troubleshooting

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