#
DIFF.BLOG
New
Following
Discover
Jobs
More
Top Writers
Suggest a blog
Upvotes plugin
Report bug
Contact
About
Sign up
The home for great developer writing.
We surface the best developer writing from thousands of independent blogs, updated daily.
Join now
→
Learn more
TOPICS
Physical Keys and Encryption Keys
28
·
John Cook
·
Oct. 29, 2025, 12:10 p.m.
Computing
Cryptography
Encryption
Security
Keys
Cryptography
Summary
This blog post discusses the similarities and differences between physical keys (like house keys) and encryption keys, focusing on their structures and implications for security.
Read full post on www.johndcook.com →
MORE POSTS LIKE THIS
Migrate to 44 Now or Get Quantum Cracked
Flying Penguin Blog ·
Apr 27, 2026
Security
Quantum Computing
[Crypto][Newbies] An easy cryptographical challenge (RSA): solution
Dennis Yurichev ·
Nov 30, 2024
Cryptography
RSA
The Design of Everyday Cryptography
chrisfenner ·
Jul 20, 2026
Cryptography
software development
Are 128-bit symmetric keys really secure against quantum computers?
Guillaume Kerkour ·
Jul 21, 2026
Quantum Computing
Cryptography
Malleating Git commit signatures
Smittyvb ·
Jul 8, 2026
Git
commit signatures
FAQ: Hello! You have posted or shared material proposing that “privacy-preserving age verification” (often: “ZKP”) exists, will work & help keep people safe
Alecmuffett ·
Jun 17, 2026
faqs
Age Verification
Discover more posts →
AUTHOR
BLOG POST FEATURED ON
Hacker News
3 points
Add this plugin to your blog
RECENT POSTS FROM THE AUTHOR
Choose how you want to continue.
Continue with GitHub
Continue with Google