Looking for an approach (and made one!) that is very small and simple code, but uncrackable

Friendly Person 44

8/1/23, 5:50 AM

I'm looking for / working on an algorithm that must be very small and simple, with no extra libraries and stuff that looks suspicious to a user using the code. You can see what I mean by reading the below. The user just keeps the dead simple code that he can even understand, and remembers his passcode, and the files are (reversibly) encrypted, and essentially uncrackable.

Here's my method, but is it really solid?:

Say the file (be it a video or text file) is this (read as bytes) > 'we walked through the', to be encrypted. And the passcode is "cloudteethbook". The first byte of the file 'w' looks at the first letter of the passcode 'c', and increments its byte position up by ex. 3 if 'c' is the 3rd of the 256 possible chars. Then the second letter of the file 'e' looks at the second letter of the passcode 'l', and does it again. Once the passcode is used up, it repeats again as it goes deeper through the file.

For a real/worked example (assuming a is 1 and z is 26, while 'space' is 27): file = 'walked through' passcode = 'acb' output = 'xdnlhfawjsrwhk' Explanation: The W is raised 1 letter up through the alphabet, because of '[a]cb', which is 1 to raise it by, which gives x. And so on. The K in WALKED is also by the 'a', because we restarted the passcode's pass.

0 + 0

encryption

Matthew Towers

8/1/23, 8:25 AM

This is called a [Vigenere cipher](https://en.m.wikipedia.org/wiki/Vigen%C3%A8re_cipher)

Geoffroy Couteau

8/1/23, 11:54 AM

And it is actually extremely easy to crack - dozens of programs out there can do it in no time (but if you invented it yourself, congrats anyway! You re-invented one of the most important ciphers of cryptography from a few centuries ago). You will find plenty of resources on the web to understand why it is *not* secure.

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: Looking for an approach (and made one!) that is very small and simple code, but uncrackable

TH: กำลังมองหาแนวทาง (และสร้างขึ้น!) ซึ่งเป็นโค้ดขนาดเล็กและเรียบง่าย แต่ไม่สามารถถอดรหัสได้

RO: Caut o abordare (și a făcut una!) care este un cod foarte mic și simplu, dar de nedescris

RU: Ищем подход (и сделали его!), который представляет собой очень маленький и простой код, но не поддающийся взлому.

VI: Tìm kiếm một cách tiếp cận (và đã tạo ra một cách tiếp cận!) đó là mã rất nhỏ và đơn giản, nhưng không thể bẻ khóa được

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