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Yes - more of this please :) Tangentially related and discussed in the past on HN: File transfer via color barcodes and a phone camera [0] https://news.ycombi
by ggerganov 4y ago
Yes - more of this please :)
Tangentially related and discussed in the past on HN: File transfer via color barcodes and a phone camera
[0] https://news.ycombinator.com/item?id=25459501 https://news.ycombinator.com/item?id=25459501
[1] https://github.com/sz3/libcimbar https://github.com/sz3/libcimbar
[2] https://cimbar.org https://cimbar.org
- egberts1 4y agoOh boy, OpSec should pay attention to this.
- thombat 4y agoIt starts with "no monitors facing windows" and "all visitors hand over phones and any other devices with photographic possibilities" and moves up the paranoia/professional caution scale from there.
- sz3 4y agoAha! I was wondering where the github stars were coming from. :) I did get a kick out of this from the OP: > Binary: Born from YouTube compression being absolutely brutal. RGB mode is very sensitive to compression as a change in even one point of one of the colors of one of the pixels dooms the file to corruption. It's more than youtube compression -- video compression in general wreaks absolute havoc on our meticulously arranged (and sometimes colored) pixels. It's actually pretty fun/instructive to step through the transition between (what you want to be) two distinct frames when you're trying to (ab)use video for this sort of use case -- there are segments of the frames that get correlated and "flip" together first, resulting in in-between frames that are gibberish even with a modest amount of ECC in play.