i got stuck on this challenge i have app3 data and try to xor bruteforce but cant find the flag need a hint plz

stuck on this challenge for almost a month now, have tried everything in my power to get the flag but could not find a single glimpse of the flag. can somebody help me into the right direction?

I need help, what to do with the data in APP3 block?

Here you go—just the bare essentials:

Process the ciphertext two characters at a time.

For the first char of each pair: subtract the current shift (modulo 32–126).

For the second char: add that same shift.

Then increase the shift by 1 and repeat.

I am not sure, how I can got this without the hint, where is info about that in jpg?

I sent request for you on Discord Kcbowhunter, I have some questions a bout this case. hope you response soon

I sent request for you on Discord Kcbowhunter, I have some questions a bout this case. hope you response soon

I sent request for you on Discord Kcbowhunter, I have some questions a bout this case. hope you response soon

I sent request for you Kcbowhunter, I have some questions a bout this case. hope you response soon

Can I obtain a hint for this challenge?

Study APP3 or just google the solution

I'm still clueless :')

Google 'jpeg file format APP application data'... to solve this problem you have to look at the internal structure of the jpeg file, and the flag is hidden in the APP3 data block

What an amazing challenge , it's hard and consume a lot of time but fun in the same time.

Glad you liked it.

hey please give a hint

APP3

what is app3 ? i don't understand

google 'jpeg file format APP3'

APP3 = FF E3 i use hexedit and i found this D..S..H..j..h..^..v..j..!..G..6..]..r..a..m..]..m..V..P..#..<..&..C..S..[....u..Z..$..Y..q..g..|..l..

i am in right direction ? i don't know what to do next please guide me ....

can you dm me on discord? #kcbowhunter

i sent the message please check

hey bro you solve this challenge please give me the genuine hint