A few months ago, I toyed with the idea of adding a server to my PassLok Privacy app. I reasoned that a server would be able to store users’ Locks so that other users could retrieve them automatically—very much like the General Directory does now, but even more deeply integrated with the program so that […]
Current version of PassLok for Email
The current version is: 0.3.1 This is the SHA256 of the .crx file obtained from the Chrome store, as described in the Help document: 2dd92b64329675580d300324e259bc61e2d319517dfb9b5c8fd9bcf547f641cb And this is the SHA256 of the .xpi file obtained from the Firefox store: 74632cef269e1c72666c3e950ade8116a7dcf73dc50d5e564f668e44172dc313
Attacking the Serpentacci ciphers
And I’d be adding Visionnaire and Worm as well. All of these ciphers resist ciphertext-only attacks quite well because the ciphertext they generate looks quite random (increasingly so as the number of letters per operation increases) and trying to decrypt with the wrong key yields a “plaintext” that looks completely random even if the key is […]
An easy way to make good substitution keys
Of course, substitution ciphers are completely insecure in this day and age, but the general idea of substitution still has a place in modern cryptography. Substitutions are what give the Serpentacci and Worm ciphers their strength. Computer ciphers can be attacked, in no small measure, because the substitutions built into them are fixed. I have looked around […]
The Serpentacci ciphers
The picture on the left is a snake with the face of Leonardo the Pisa’s (a.k.a. Fibonacci). Have I gone crazy? Perhaps so, but here the image is an attempt to visualize the unholy offspring of a renowned mathematician of the XIII century and a XX century video game. Its name is Serpentacci, and it’s […]
Autokey strikes again!
Did you know that the actual cipher invented by Blaise de Vigenère, back in the XVI century, is not the one that bears his name? The so-called Vigenère cipher was actually invented a few years earlier by Giovan Battista Bellaso. Vigenère’s own creation is a version of what today we call “autokey” cipher, and it is […]
The Visionnarie cipher
The autokey cipher was invented nearly five hundred years ago by Blaise the Vigenère, pictured at left, but was almost immediately forgotten in favor of a much weaker repeating-key cipher invented by Bellaso, once upon a time known as “the undecipherable cipher,” which Vigenère somehow got credit for. Given how many important secrets were revealed when […]
Current version of SeeOnce
Current version of SeeOnce is: 1.1.1 Made on 7/18/16 Main source: https://seeonce.net Checksum for web sources (single html file): SHA256: 0f45-599e-fa82-2fcf-f43e-0b57-939b-218e-d48a-f5c5-decf-d647-a627-5404-4ddb-4b60 See the author reading this:
Snake cipher
Not too long ago, I introduced the TripleText cipher, which gets dangerously close to perfect encryption while remaining very simple. Well, it just got even simpler, almost like playing a game. Because using this cipher is so much like playing the old “snake” video game, I’ve called it just that: Snake
FilePad encryption
This one is not for paper and pencil, but is based on the same ideas as a bunch of paper and pencil ciphers in this blog. FilePad uses a file as key to encrypt another with extreme security. Here is FilePad, as JavaScript code running on a web page. Now, what’s the use of this, […]