Encryption and encoding are different. Encoding is data manipulation to make it usable, giving it a structure such as a B-tree, sequences of timed keying or formatting to provide error checking or redundancy like convolutional encoding. The design of the algorithms to encode data do not include keeping the unauthorized or unintended from getting at the data. The only reason it provides any security is because of the inherent obfuscation or technical barriers, no matter how trivial they may be. Encryption is taking data, and presenting it in a form so it can only be used by the intended party or parties. It is the only reason an algorithm or method exists. Enigma encrypted messages that would be encoded by a telegraphy operator on a German submarine.