We have intercepted communication in a private network. It is used a strange protocol based on RSA cryptosystem. Can you still prove that it is not secure enough and get the flag? We have a pcap files with multiples TCP sessions and a python script: #!/usr/bin/python import sys import struct […]
Do you like math? We have an encrypted flag.wmv.out file and this python script: #!/usr/bin/python import random from struct import pack def Str2matrix(s): #convert string to 4×4 matrix return [map(lambda x : ord(x), list(s[i:i+4])) for i in xrange(0, len(s), 4)] def Matrix2str(m): #convert matrix to string […]
Welcome to Microsoft Security Assessment Lab. As far as we are concerned, you are once again applying for an information security job at our vacancy. Our policy has changed. We’re not making our products secure anymore — we’re now providing bugs to NSA. They have run out of their CYCLONE […]