20-02-2016, 05:44 AM
I can think of some simple steps that can produce a really tough cipher.
For example, suppose the author encodes the following text:
The Rain in Spain Falls Mainly on the Plain
As follows:
De rhein een cepain faals mayneli oen the pelain.
Then writes it down using a different alphabet. The result would be essentially as practical as a simple monoalphabetic cipher but much tougher to break because it's less susceptible to frequency analysis (among others).
As Nick said, we don't know if the cipher is complex or just cunning.
For example, suppose the author encodes the following text:
The Rain in Spain Falls Mainly on the Plain
As follows:
De rhein een cepain faals mayneli oen the pelain.
Then writes it down using a different alphabet. The result would be essentially as practical as a simple monoalphabetic cipher but much tougher to break because it's less susceptible to frequency analysis (among others).
As Nick said, we don't know if the cipher is complex or just cunning.