# JPEG File (Misc, 100p)
```It will be fixed if you change somewhere by 1 bit.```
In the task we get a [jpeg file](tktk.jpg) and the description is quite clear - we need a single bitflip to uncover the flag.We simply generated images with bitflips and the scrolled through thumbnails.We thought about using tesseract but it would take much time.
Bitflips were generated via:
```pythonimport codecs
def main():    start_byte = 0    stop_byte = 700    with codecs.open("tktk.jpg", "rb") as input_file:        data = input_file.read()    for byte in range(start_byte, stop_byte):        for bit in range(8):            modified = chr(ord(data[byte]) ^ (1 << bit))            output_data = data[:byte] + modified + data[byte + 1:]            with codecs.open("res/" + str(byte) + "_" + str(bit) + ".jpg", "wb") as output_file:                output_file.write(output_data)main()```
And once we flipped bits in byte 623 we got the flag:
![](623_1.jpg)
The flag was `SECCON{jp3g_study}`