In The Codebreakers, a 1967 book by David Kahn about the history of cryptography, the reference to Mlecchita Vikalpa in Kamasutra is cited as proof of the prevalence of cryptographic methods in ancient India.
For example, in the erstwhile Travancore Kingdom, spread over a part of present-day Kerala State in India, it was practiced under the name Mulabhadra with some changes from the schemes described by Yashodhara.
[4][5] The great Indian epic Mahabharata contains an incident involving the use of this type of secret talking.
This is an elementary and trivial method for obscuring the true content of spoken messages and it is popular as a language game among children.
The idea is to add some unnecessary letters chosen randomly to the beginning or to the end of every word in a sentence.
For example, to obscure the sentence "will visit you tonight" one may add the letters "dis" at the beginning of every word and convey the message as "diswill disvisit disyou distonight" the real content of which may not be intelligible to the uninitiated if pronounced rapidly.