Revealed: The 6 secret codes that remain unsolved - so, can you decipher them?

These six codes have baffled experts for hundreds and sometimes thousands of years. So, do you think you have what it takes to crack them?

Revealed: The 6 secret codes that remain unsolved - so, can you decipher them?
These six codes have baffled experts for hundreds and sometimes thousands of years. So, do you think you have what it takes to crack them?