![]() When using a physical CD-R(W), the emulation software intercepts (filter driver?) the reading and will alter the timings to simulate the density variations of the original disc. The resulting image can be inserted into a virtual drive which will behave 100% like the original disc. The copying software does a detailed DPM before (or after) copying the normal data of the given CD. With the help of a DPM (Data Position Measurement) analysis file, emulation can be applied to both, a physical disc (drive), and a virtual disc (drive). This is the first step of any method of creating a working copy. The awkward density variations of SecuROM New discs can be measured. ![]() Method 1 – RMPS (Removable Media Physical Structure) Emulation Still: This is about backing up, not downloading cracks: ![]() The game might work on newer operating systems where old, disc-based DRM sometimes causes trouble. Arguably a crack is the most convenient thing to have, since neither additional software, nor hardware or any CD is needed. That is not backing up the original disc (and for purists: It is piracy according to the law, since you are downloading copyrighted stuff, normally the main executable in decrypted form). What I’ll not cover here is just downloading a No-CD crack. Generally there are multiple ways of achieving the same goal: Running SecuROM infected software without having the original disc in the drive, thus defeating SecuROM. To defend my approach a bit: It feels rewarding to fool disc based DRM and trying to look behind the scenes a bit – even without being a talented reverse engineer diving into disassembly. Long story short: If you find this text obsolete and outdated, you are somewhat right. Having a backup CD-R in the drive which the protection will accept as original, should have been enough to be relatively save (theoretically improved detection of known backup methods could have been applied in updates – don’t know if this was the case.) For people playing online, which was already the often the case about 2002/2003, a crack/modification wasn’t ideal either: An update requires waiting for a new crack to come and caries the risk of being caught and banned.CDs can easily break… and if children were playing with them (using multiple games and changing discs), it was just a question of time until an expensive disc shattered or at least became unreadable.When the following methods of copying SecuROM appeared, they did have practical use: As GBAtemp’s Backup Reminder, I want to emphasize the importance of backups once more at this point: I want to make sure that the knowledge about possible approximations doesn’t get lost (TwinPeak and Plextor Premium) Since the demise of the forum (formally cdfreaks), a lot of interesting information is lost or at least much harder to find (the Wayback Machine has backed up a lot… if you know the old URLs).ĬD protections relying on physical attributes (angles, density) have often been considered to be impossible to successfully replicate with consumer hardware. The reason for writing this, is more keeping old information available at a single point, rather than any practical usecase. Old versions of Blindwrite Suite can be found on the official VSO site with the help of the Wayback Machine. If anybody wants to follow the TwinPeak method below, they will have to search up the stuff on their own. I have no idea if I am allowed to share all the stuff I used (not only talking about the demos of commercial software, I mean all the programs). I will not provide any of the needed software because of licensing questions. This means, that a CD-R(W) copy will not have any deviations in linear data density across the whole spiral track and is thus easily revealed as a duplicate (and rejected of course). This can be measured by observing the read speed/timings of reference points.Ī CD-burner on the other hand, writes the data at a constant, defined size. The idea behind newer iterations of SecuROM is having a pattern (different for each title) of areas with lower linear density compared to the surrounding parts. To keep this very long thing at least a bit little shorter, I’ll focus more on what has to be done, rather than why it is done and keep the technical background at a minimum: This text will cover several ways of backing up CD-ROM¹ based software, mostly games, that are protected² with SecuROM New in version 4.8³ and higher.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |