Cool and easy!

Fun and easy!

nice !

Damn this was a fun challenge

Wow, this one was really fun. Not just binwalk or steghide, but truly an upper-medium difficulty level! Really liked this challenge, thank you! Hint: when it comes to length, don't overthink it but be careful with it!

Glad you liked it, I enjoyed creating it.

i dont understand with -iv and -K, where i find them, i need them to solve, i get the clue : -iv SOF0 and -K SOS, what meaning that!!, help meee @kcbowhunter

You need to google jpeg file format, SOF0 is a certain block inside the jpeg image, SOS is 'start of scan'

I've found -sof0 and -iv in after using dump image on https://cyber.meme.tips/jpdump/#, then what should I input in -iv and -K? I've found the flag.enc file, so that the flag.enc file can be decrpyt? my problem is just because -iv and -K, help mee @kcbowhunter

you put the bytes in i.e. BAADF00D you need to research how many bytes are needed

Ah finally, it was an awesome challange! Don't forget to put newline at the end of the flag.enc like me :p

Your key and iv are close but not quite correct. How many bytes are in the iv? You are short one byte. And the key is missing a few bytes at the start.

i hate this f*ckin "C". i think it is part of the aes cipher that make me stuck about few hours for getting bad decrypt. I suddenly noticed because of this web https://cyber.meme.tips/jpdump/#. btw thanks kcbowhunter, i learning a lot from this challenge

I don't really get why the C be there. Anyone could explain?

Was interesting, learned a lot, this is kcbowhunter signature. Good job!

Thanks!

I've found -sof0 and -iv in after using dump image on https://cyber.meme.tips/jpdump/#, then what should I input in -iv and -K? I've found the flag.enc file, so that the flag.enc file can be decrpyt? my problem is just because -iv and -K, help mee @kcbowhunter

you put in the byes, ie. BAADF00D, you need to research how many bytes are required

learnt more about aes256, nice challenge!

Thanks to kcbowhunter for your help.

Very nice challenge! Learned alot about encryption and jpg compression.

Glad you liked it, this was one of my favorites to create.