Jackcooper@lemmy.world to Asklemmy · 1 year agohow did military commanders in olden times send instructions across hundreds of miles without concern of forgery or interception?message-squaremessage-square40fedilinkarrow-up1120arrow-down11file-text
arrow-up1119arrow-down1message-squarehow did military commanders in olden times send instructions across hundreds of miles without concern of forgery or interception?Jackcooper@lemmy.world to Asklemmy · 1 year agomessage-square40fedilinkfile-text
Let me know if there is a better community for this type of question. I am still learning my way around.
minus-squareAkasazh@feddit.nllinkfedilinkarrow-up10·1 year agoTo add to other comments: There are ways of folding envelopes or letter packages that are destructive in opening, so that tampering could be noticed. The practice is called letter locking, here’s some links: https://en.m.wikipedia.org/wiki/Letterlocking https://arstechnica.com/science/2021/03/locked-for-300-years-virtual-unfolding-has-now-revealed-this-letters-secrets/
minus-squareramble81@lemmy.worldlinkfedilinkarrow-up3·1 year agoI did that as a kid in school passing notes!
To add to other comments:
There are ways of folding envelopes or letter packages that are destructive in opening, so that tampering could be noticed.
The practice is called letter locking, here’s some links:
https://en.m.wikipedia.org/wiki/Letterlocking
https://arstechnica.com/science/2021/03/locked-for-300-years-virtual-unfolding-has-now-revealed-this-letters-secrets/
I did that as a kid in school passing notes!