Rating: 3.0
We are given with a **gzip** compressed file called `psst.tar.gz`.
Decompress it with `gzip -d psst.tar.gz` and it gives a **tar archive** called `psst.tar`.
Run `tar -xf psst.tar` and it gives a directory `chall`.
In it, there is another *directory* and a *file* which contains a character.
What we have to do is go to a directory, collect a character from a file and go to another directory and collect another character.
Here is a *python script* to do that
```python
# solve.py
# Save the script in 'chall' directory and run it
import os
# There is only one directory in chall
# So go to it
os.chdir("Security")
# loop until there is only one file
while True:
# list the directory and store results in items
items = os.listdir()
for item in items:
# if the item is directory, set next directory to it
if os.path.isdir(item):
next_dir = item
# if the item is a file, read it and print the content
else:
with open(item, 'r') as file:
print(file.read().strip(), end='') # end='' to not to print new line
# if there is only one item ( which means only one file ) break the loop
if len(items) == 1:
break
# change to next directory
os.chdir(next_dir)
print("")
```
Run it and it will print out the flag
```
$ python3 solve.py
BSNoida{d1d_y0u_u53_b45h_5cr1pt1ng_6f7220737461636b6f766572666c6f773f}
```
*flag*: `BSNoida{d1d_y0u_u53_b45h_5cr1pt1ng_6f7220737461636b6f766572666c6f773f}`
