The plaintext:
The llama orlamaglama is a South American camelid widely used as a pack and meat animal by Andean cultures since prehispanic times, although early writers compared llamas to sheep. The irsimilarity to the camel was soon recognized. They were included in the genus camelus along with alpaca in the systema naturae of linnaeus.
Someone encrypting a message can make decryption more difficult by choosing unusual words and removing punctuation and the spacing between words. See if you can work out the method used for encrypting this message.Think about sequences if you get stuck.
The encryption method:
This is a subsitution cipher. The method used for encrypting has a pattern. It starts with a --> e, then it skips with each step of 3 alphabets, ie b --> h and c --> k, etc. After z, repeat the cycle.
To express in terms of mathematics, we can assign codes to the alphabets, ie a=1, b=2, ..., z=26.
For a letter with code x in the plaintext, it is converted to an alphabet of code (3x+2) mod 26 in the cipher text.