Think of cryptography as the science of keeping things secret. Cryptography can include things such as:
Encryption: Making the secret safe
Decryption: Finding what the secret says
Hashing: Has the secret been kept safe
Below is an example of a cryptogram. Discovered in a futuristic city, this book contains the secret key needed to crack the cryptogram. Try your hand at cryptography!
$
@
#
Type the correct letter for each symbol and then click Submit.
