AilliA on Nostr: imo, "The first free national pager" was pinprick cipher in UK after 1840 ))) "A dot ...

imo, "The first free national pager" was pinprick cipher in UK after 1840 )))
"A dot or pinprick concealment cipher is a common classical encryption method in which dot or pinprick is placed above or below certain letters in a piece of writing...
...Victorians used the pinprick trick too, not for spies but to dodge high postage fees (rates varied but often around a shilling per hundred miles or so for a letter before the 1840 Penny Post reforms). Newspapers mailed free, so they’d pinprick messages on the front page and send those instead of letters."
I wrote abt it here: https://aillia.substack.com/p/steganography-101-hiding-wallet-seeds