Denholm Knowles
@historyofcyber.substack.com
Cyber security historian
https://historyofcyber.substack.com/
Author of "Freaks of the Wireless"
https://securityblendbooks.com/products/freaks-of-the-wireless
https://historyofcyber.substack.com/
Author of "Freaks of the Wireless"
https://securityblendbooks.com/products/freaks-of-the-wireless
People tend to think that security is something you do when really, it is something you feel.
Insights from 450 years ago highlight this. After all, there is nothing more dangerous than security.
Insights from 450 years ago highlight this. After all, there is nothing more dangerous than security.
There is nothing more dangerous than security!
Sir Francis Walsingham - England's master of perpetual vigilance.
open.substack.com
January 8, 2026 at 5:39 PM
People tend to think that security is something you do when really, it is something you feel.
Insights from 450 years ago highlight this. After all, there is nothing more dangerous than security.
Insights from 450 years ago highlight this. After all, there is nothing more dangerous than security.
Journal Obscura
My new blog for 2026 looking at the history of security and technology!
It would be nice to kick off the year with a few subscribers!
My new blog for 2026 looking at the history of security and technology!
It would be nice to kick off the year with a few subscribers!
Journal Obscura
A blog about security and technology history
open.substack.com
December 27, 2025 at 2:36 PM
Journal Obscura
My new blog for 2026 looking at the history of security and technology!
It would be nice to kick off the year with a few subscribers!
My new blog for 2026 looking at the history of security and technology!
It would be nice to kick off the year with a few subscribers!