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Comments (43)
- bmenrighI made a CTF challenge for this year's BSidesSF CTF where players were given a CDDA audio file (just raw PCM samples) which when burned on a CD-RW would produce an image of the flag. (The idea was not for them to burn the audio, since they'd need to guess my exact CD-RW or else they wouldn't get an image readable enough to be useful. Instead they were supposed to invert the process in software and simulate what a burned disk would look like, in a way that let them adjust disk parameters rapidly until they had a readable image.)The challenge took me a few weeks to make because "calibrating" a disk (determining the geometry of the pregroove) is incredibly sensitive.After the CTF I tried really hard to make a repeatable calibration process with the intent of building something releasable. I even ended up measuring the details on every CD-RW and CD-R I could buy on Amazon.But despite trying very hard, I never did make calibration patterns that were reliable enough that I felt like other people would be willing to go through the process.It seems someone else has succeeded where I failed. Great to see!
- apitmanThrowback to lightscribe which I haven't thought of in many years: https://en.wikipedia.org/wiki/LightScribe
- anfractuosityAlso see https://github.com/arduinocelentano/cdimage from a few years ago
- kixpanganibanThis is exactly the sort of thing the 2020's are missing. Something tactile and artsy, reminiscent of the early 2000s! Well done to the author
- AnimatsI used to have a label system called Neato, which provided round CD labels you could make on a printer, along with a tool to press them accurately onto the non-recording side of a CD-R. There were even transparent labels, so the resulting disk looked like a commercially produced disk.
- FriedPicklesI've always wondered if this could be used to create 3d holograms.
- LeoPantheraIs anyone still making new optical drives?
- jonhohleWindows 2000 & XP discs had something like this, but on the label side.
- NDlurkerWow! Light Scribe on the data side!
- LarrikinDo they actually play?
- DANmodeDo folks here know the data goes “into” the label through the clear plastic?A fellow xth grader did a science project on this, and I’ll never forget it.
- anonym29star graph looks very inorganic
- weng[flagged]
- carplaybits[flagged]
- bronlundIs it just me or do other find anime girls plastered all over a project kind of off-putting?
- cowlevelTruly, China has overtaken the Western world in innovation.I wonder if the disk can still hold data at the same time.