This task is about steganography, but you need no guessing here. The algorithim is provided. However, there is also 10K pictures (as an array), and only one has hidden information. Be careful, size of the file is 5.4GB!
You can download only the encryptor (it's small).
sha256:
- ae9f30abf39ed1078655b4aee16a9c1174f76c17da876eadc7be4877166d256 CTFdata.tar.gz
- 7167bb7062bc084525a17c7cad404459fdeb272a4377504e6fe2ad473f17fc20 CTFdata/encoder.data-00000-of-00001
- 599f6dc8bf86398e53a32acb00049bb297c5a1aab8395fa2356c5168260046bc CTFdata/encoder.index
- 4ae6b72bfac8654f163a01018bf97b4e190e99fcbff5ba747e10b0a36309e120 CTFdata/encoder.py
- 0e92001cb330b70fcee3ff17a25fe11bee3ab0f064177112fa803b4a0739f6cd CTFdata/images.nparray
PS Big K.
All files: https://justctf.ams3.digitaloceanspaces.com/11456603-ff00-4b10-9863-296fc0cf0342/CTFdata.tar.gz
Attachments: