Recent Posts

Can COViD break Alice’s design?

This is the second challenge from the Cryptography section of Stack-The-Flag 2020 by govtech-csg. It uses LFSR stream cipher to encrypt 500 bytes of data and...

Can COViD steal Bob’s idea?

This is the first challenge from the Cryptography section of Stack-The-Flag 2020 by govtech-csg. The challenge wants us to break vulnerable Diffie-hellman pa...