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Postman CryptoburstCTF 2022 writeup

Postman - cryptoburst ctf 2022 writeups

we were given the image /cryptoburst/postman.png

first i tried searching for postman qr. Found no result. then, i tried reverse searching with google images. i found a similar images, from a website explaining types of barcode. https://www.dynamsoft.com/blog/insights/the-comprehensive-guide-to-1d-and-2d-barcodes/ the name of the barcodes are MaxiCode. It was used by UPS so the name Postman makes sense. Now it just comes down to reading the qr. After some browsing i found an online tool for reading. https://products.conholdate.app/barcode/recognize/maxicode here’s the result:

CBCTF{It5_jU5T_Up5CoD3}