Ancient Indian Cryptology

Coded messages and mysteries have fascinated me from childhood.

I landed across this fascinating method of coding numbers in the form of poems in this video. The method used is a simple number-to-letter mapping technique.

Consider this shloka (Sanskrit verse):

गोपीभाग्यमधुव्रात-श्रुग्ङिशोदधिसन्धिग ॥
खलजीवितखाताव गलहालारसंधर ॥

This is a simple verse apparently in the praise of Lord Krishna. Here is the meaning..

O Lord anointed with the yogurt of the milkmaids’ worship (Krishna),
O savior of the fallen, O master of Shiva, please protect me.

(I would request any Sanskrit experts to shine a light on the meaning of each word)

CryptA simple system is used called the Katapayadi System. Here, क(ka) is 1, ख(kha) is 2,ग(ga) is 3, घ(gha) is 4 and so on..

Applying this, we get the value: 3.1415926535897932384626433832792 which is the value of Pi upto 31 decimal places. My mind was blown at this clever encryption into a poem!

I did the decryption myself to cross-check and it matches.

These encryption techniques date back upto 700 CE in India.

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