अमित्राटवीसंचारं च राज्ञो गृहकपोतैर्मुद्रायुक्तैर्हारयेत्धूमाग्निपरम्परया वा ॥ कZ_०२.३४.११ ॥
amitrāṭavīsaṃcāraṃ ca rājño gṛhakapotair mudrāyuktair hārayet dhūmāgniparamparayā vā
He shall convey to the king information about enemy movement through the forest, by means of domesticated pigeons bearing sealed tokens, or else by a chain of smoke-and-fire signals.
To authenticate origin and prevent tampering or spoofing—an early form of message integrity and sender verification.
Faster broadcasting across fixed points and less dependent on animal handling; pigeons are better for discrete point-to-point transmission.