CPRM, “Content Protection for Recordable Media,” is Japan’s unique DVD/Blu-ray copyright protection technology. After recording digital terrestrial broadcast programs onto a DVD, it restricts copying to other recording media, allowing only a single recording. DVD packages bearing “cprm compatible” markings are commonly seen. There are three standards: DVD-RW, DVD-R, and DVD-RAM. It’s crucial to confirm your DVD recorder’s compatibility before purchase.
Similar Mechanisms: “Copy Once” and “Dubbing 10”
“Copy Once” permits a single recording of digital terrestrial or BS broadcast programs. Copying this recorded DVD to another recording media results in the original data’s enforced deletion. It involves moving recorded data from the recording device to a DVD. To play “Copy Once” program DVDs, a CPRM-compatible DVD player is necessary. Without compatible drives or playback software, they can’t be played.
“Dubbing 10” allows for “9 copies, 1 move” for a single recorded program. The first nine copies can be made onto recording media, but on the tenth attempt, it becomes a move operation. Once a DVD has been dubbed, it cannot be dubbed again.
It’s indeed inconvenient that recording data cannot be copied, but software exists to remove .
Passkey: Removing CPRM from DVD and Blu-ray (Windows)
DVDFab Passkey is well-known for removing copy protection from DVDs and Blu-rays, including CPRM found on paid digital terrestrial recording discs. It’s split into four products: Passkey for DVD, Passkey for Blu-ray, Blu-ray Recorder, and 4K Recorder. Purchasing these separately or bundled offers economic benefits. The software offers a 30-day free trial with full functionality. Passkey Lite, a permanent free version, unlocks some old copy protections on DVDs and Blu-rays but doesn’t handle CPRM. Let’s focus on Passkey for DVD here.
Passkey for DVD handles various protections like RC, RCE, APS, UOP, ARccOS, RipGuard, and CPRM added when recording terrestrial digital and BS digital on DVD-VR. DVDs with removed CPRM protections cprm 解除 can be played on standard DVD players or converted to DVD data, enabling unlimited copies on a computer’s HDD. The software allows configuring whether CPRM protection is applied to the output DVD data (ISO file) or not, and it supports most copy guards except for new protection 2.0/Cinavia.
- Operating Environment: Windows
- Input Format: DVD Disc
- Output Format: DVD, ISO, Folder
- Supported Copy Guards: RC, RCE, APS, UOPS, ARccOS, RipGuard, CPRM, V36, RC, BD-Live, etc.
Passkey Download and Installation Steps:
- Click “Download Passkey” to acquire the .exe file.
- Click the .exe file, then select “Quick Install” to begin installation. The download screen provides installation instructions.
Steps to Remove CPRM from DVD using Passkey:
- Launch Passkey, select the “DVD” tag from the welcome screen, and click “Start DVDFab Passkey” in the bottom right corner. Passkey will minimize to the system tray and detect if media is in the Blu-ray drive.
- When a DVD with CPRM is inserted, Passkey automatically recognizes and reads the DVD data. After a few seconds, it deciphers the DVD copy guard. The right-side screen displays drive information and embedded protection types.
- The decrypted DVD can be played on any standard DVD player.
Steps to Rip DVD Disc to PC using Passkey:
- If you wish to rip the CPRM-removed DVD disc to your computer, right-click the minimized DVDFab Passkey icon in the system tray and select “Rip to Hard Disk” or “Rip to Image.”
- Specify the output target in the popup window and click “Rip.”
Note: If choosing “Rip to Image File,” check “Do not remove protection” in the popup dialog to retain copy protection in the resulting ISO image file.
CPRM copy protection is outdated, yet many discs remain encrypted. While CPRM Decrypter once provided free CPRM removal, as it’s discontinued, consider using Passkey or DVD Copy if errors occur. They excel in DVD and Blu-ray copy guard removal. CPRM decryption using relCPRM is covered in a separate article.
If you’re seeking free alternatives to bypass DVD copy protection, I suggest checking out vidon.me. This website offers valuable insights into DVD and Blu-ray backup strategies, accompanied by comprehensive guidelines on copying. They extensively examine different decryption methods and techniques to remove copy protection, aiding users in preserving their DVD content and converting it to diverse formats.