Traditional Crypto Scheme

It will take 28 years for a prey that migrates every 7 years to be eaten by a predator that migrates every 4 years. However, it will only take 12 years for a prey that migrates every 6 years to be eaten by a predator that migrates every 4 years. So, by choosing odd years to migrate, the former prey extends its life expectancy by 16 years.

Interestingly, in the Old Oyo Kingdom, in the time of war, the Alaafin (I.e. the commander in chief of armed forces) and the Oyomesi (I.e. traditional senators) often chose odd days to send cryptic messages (I.e Aroko) to the Aare  Onakakanofo (I.e. Generalissimo) on the battle field.

Wait for it: in pure math, it's found that most odd numbers are prime, and they're very difficult to guess in a sequence, making them excellent crypto keys. In fact, very recently, anthropologists discovered an insect in South America that uses a prime-numbered life-cycle to drive natural selection.

We can modernize the above crypto-scheme with the use of Odu Ifa binary ciphers. The Odu Ifa literary corpus is said to comprise 16 books with 256 chapters. The first book in the Ifa corpus is the book of Ogbe; the book of Ogbe has the most chapters in the Ifa literary corpus (I.e. 31 chapters). It suffices to know that 31 is a prime number, making Odu Ogbe the most reliable book for encrypting data in the Odu Ifa binary suite. In other words, a sender can hide information in one of the 31 chapters of Ogbe and share the key/cipher secretly with the recipient.