Tagged “cryptography”
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NSA Backdoor Key from Lotus-Notes
A classic 1997 write-up by cryptographer Adam Back on how export versions of Lotus Notes carried a built-in key escrow s…
Passphrase Cracking Calculator
A calculator that estimates how long and how much money it would take to crack a word-based passphrase, assuming the wor…
Psychedelic Cryptography
A contest write-up about encoding messages that can only be understood in non-ordinary states of consciousness, a strang…
Schneier on Security
The blog of cryptographer Bruce Schneier, offering influential analysis of security, privacy, and the societal impact of…
SCREAM CIPHER
A playful post showing how the many Unicode variants of the letter A can encode a message as a cipher that looks like a…
SHA-256 Algorithm Explained
A step-by-step visual walkthrough of the SHA-256 hash algorithm, showing each operation on the bits as a message is proc…
The Animated Elliptic Curve
An animated visual explainer of elliptic curve cryptography, building from point addition on a curve to the Curve25519 k…
The Animated Elliptic Curve
An animated, interactive walkthrough of elliptic curve cryptography, letting you drag points and watch point addition an…
The Illustrated TLS 1.3 Connection
Click through a real TLS 1.3 connection byte by byte: every handshake message, key calculation and encrypted record is a…
The Illustrated TLS 1.3 Connection
An interactive walkthrough of a single encrypted web connection where you click through every byte of the TLS 1.3 handsh…
The Illustrated TLS Connection
A byte-by-byte illustrated walkthrough of a real TLS handshake, with color-coded fields explaining what every part of th…
The Kryptos Project: Ed Scheidt
Profile of Ed Scheidt, the CIA cryptographer who helped Jim Sanborn design the Kryptos sculpture cipher, on a fan resear…
The Master Theorem
A beautifully designed series of encrypted logic puzzles guided by the enigmatic M, with hints, solutions and a communit…
The Mayday Mystery
The firsthand story of the Mayday pages, cryptic ads full of symbols, languages and math that appeared in a Tucson stude…
timelock.dev
Encrypt a message in your browser so nobody, including you, can read it until a date you pick, using the drand randomnes…
TNMOC
The National Museum of Computing, based at Bletchley Park, showcasing rebuilt wartime codebreaking machines and the hist…
Video-Based Cryptanalysis
Research page showing how secret keys can be extracted from smart cards and phones by filming a power LED or hub light,…
Virtual Enigma
A working simulation of the WWII Enigma cipher machine where you set rotors and plugboard, type messages and watch the l…
Why Haven't Quantum Computers Factored 21 Yet?
Craig Gidney explains why quantum computers factored 15 in 2001 but still have not factored 21, and what that really say…
Windows on Theory
A research blog on the theory of computing, with essays and lecture notes on algorithms, complexity, cryptography, and l…
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