Rating:
Just reverse the operation
```py
#!/usr/bin/env python
from pybitrot import ror8, rol8
def decrypt(buf):
out = bytearray()
for x in buf:
a = rol8(x, 8) ^ 0x16
b = ror8(a, 4)
out.append(b)
return out
def main():
buf = bytearray("\x11\x80\x20\xe0\x22\x53\x72\xa1\x01\x41\x55\x20\xa0\xc0\x25\xe3\x35\x40\x55\x30\x85\x55\x70\x20\xc1")
rs = decrypt(buf)
print(bytes(rs))
if __name__ == '__main__':
main()
```
