feistel | A toy Feistel network implementation | Encryption library
kandi X-RAY | feistel Summary
kandi X-RAY | feistel Summary
This is a feistel cipher implementation I wrote for a Computerphile video. While I started with this being a simple couple of functions, I realised that if I wanted proper file IO, I needed to code up a mode of operation. It now encrypts files and outputs ciphertext as files, theoretically you could write your own functions to call the cipher itself, which is found in feistel.py. Feel free to edit, change, reuse the code for whatever you wish.
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Top functions reviewed by kandi - BETA
- Encrypt a block of data
- Round block to block
- Emits an iterator yielding the last item and the last item
- Add padding to the given block
- Reverse the block
- XOR operation
- Encrypt block
- Decrypt the cipher block
- Decrypt a block
- Remove padding from block
- Decrypt a block of data
- Encrypt block of data
- Encrypt a block of data
- Returns the XOR block
- Decrypt block data
- Generates blocks of block_size bytes
- Encrypt data using the ciphertext
feistel Key Features
feistel Examples and Code Snippets
Community Discussions
Trending Discussions on feistel
QUESTION
I'm trying to encode an image using the Feistel cipher. The idea was to take an image file, read byte per byte the image, encode every byte with my Feistel cipher, and re-create a new image with the encoded byte generated by the cipher.
Unfortunately, I've found out most of the common image formats use headers that, once encoded, make the encoded image corrupted.
Having a look at the PIL package I've found out the PIL.Image.frombytes function is able to create an image object given a BytesIO object. With the image object, I'm able to recreate the image with the save function
My issue now is, how to open an image and read the actual image payload in bytes that I need to process with my Feistel cipher.
If I use the code
...ANSWER
Answered 2021-Apr-22 at 21:33The best solution is to encode every pixel of the image by themselves and then re-create the image with the new pixels encoded
QUESTION
So, I have done FCC's project "Random Quote Machine", I have done the all the basic requirements such as changing the quote,color and tweet the quote. But one thing I can't do,that is the fade-in and fade-out animation of the quotes, e.g like this:https://codepen.io/freeCodeCamp/pen/qRZeGZ
In the above link,the animation has been done by jQuery. But I have done my project on ReactJS
Here's my codesandbox if you want to fork:https://codesandbox.io/s/amazing-feistel-b2u6j
and also here's the code:
...ANSWER
Answered 2021-Jan-15 at 08:31Add transition="0.8s linear" property to the root element(box) to make color transition smoother.
QUESTION
I am currently attempting to increment by 5 days based on the current date. I am successfully able to do so, with some unwanted results. While I increment, I am currently pushing them into an array and the list will continue to grow as I increment. I am trying to only show 5 results at a time. if my current date is dec.16 I only want to show from dec.16-dec.20. if i increment from there I only want to show from dec.21-dec.25..so on and so forth. As opposed to maintaining the array of dates and slicing, or something along those lines, I would like to reset the array each time I increment. my code is as follows:
...ANSWER
Answered 2020-Dec-16 at 22:14I don't understand what are you trying to do but, either you can reset the list or use an array slice like days.slice(Math.max(days.length - 5, 1))
For your problem, I edited a solution for you
It was the inc was increased by 5 and then 10 and then 15, so the solution was to delete 4 days from today and increment it by inc
QUESTION
How to update the Vue form field through the DOM?
I need to update field data through an external script. For this I need to know if it is possible to update the data through the DOM.
https://codesandbox.io/s/compassionate-feistel-26r4v?file=/src/store.js
I tried to do it directly through the Store, but in my case it doesn't work.
How to call the VueJs object via Chrome Extension?
Example
...ANSWER
Answered 2020-Jul-11 at 06:59you can use ref for similar to querySelector reference in SFC.
in :
QUESTION
I'm trying to do it this way.
However, the return is not defined.
The status of the object is visible, I just can't change it.
...ANSWER
Answered 2020-Jul-10 at 19:15Your form is not watching for updates from the store. It is only receiving this.$store.state.form on creation.
After running App.$store.commit("setForm", {entrada:'245435'}) in the console, if you run App.$store.state.form you will see that entrada: "245435" has changed on the store.
If you want the form to watch for changes from the store, make it a computed like so:
QUESTION
I am working with React and React Forms and i am having trouble trying to handle the state changes for radio buttons. I have a function getField which dynamically renders the type of input from the state. I have another function HandleFormStateChange which handles the change event for the inputs but i am running into an issue with the radio buttons. The user should be able to select only one option at a time but it seems to be selecting simultaneous options.
Please check out this CodeSandbox.
This is the complete code:
...ANSWER
Answered 2020-Jun-21 at 11:54It is selecting multiple options because your radio buttons are not grouped by their name, they have separate names of their own. I've made an edit in your codesandbox - we have to have same name for your radio buttons to group them together. The same is the case with checkboxes if you want to group them together.
I've made couple of changes to your code:
- I've added a name to identify the radio-group.
QUESTION
I have created a basic single page app, on initial page there is some dummy data and on click of each item I direct user to individual details page of that item. I wanted to implement comment and delete comment functionality which I successfully did but now when I comment or delete the comment it doesn't only happen at that individual page but in every other page too. Please see the sandbox example for better clarify.
https://codesandbox.io/s/objective-feistel-g62g0?file=/src/components/ProductDetails.js
So once you add some comments in individual page, go back and then click to another products, apparently you will see that the comments you've done in other pages are also available there. What do you think causing this problem ?
...ANSWER
Answered 2020-May-31 at 13:39The same state being reused by all the different pages.
Try to load dynamically load reducers for each page/router differently to use distinct state values.
You can start from here
QUESTION
I have a problem with saving the state of the search query.
When the popover is brought into focus, the searchString starts with undefined (second undefined value in picture). When the key 'b' is pressed, the event is fired, and it sets the value to "" (initialized value). As shown, when "bart" is in the search query, console only registers "bar". Does anyone know why this behavior occurs? The end goal is that I am trying to retain the search string on selection (it disappears onclick) -> would appreciate any help with this. The main code block where these changes are happening:
...ANSWER
Answered 2020-Feb-25 at 05:10Material UI autocomplete by design resets the search value every time you select an option. If you want to by pass it, use useAutocomplete hook to fine tune the component according to your need.
As for delayed console log values, you're setting the new value and then you're console logging the old value. So obviously it will print the old value, what else did you expect?
You code should have been like this
QUESTION
Can we apply bit manipulation on a character string? If so, is it always possible to retrieve back a character string from the manipulated string?
I was hoping to use the XOR operator on two strings by converting them to binary and then back to character string.
I took up some code from another StackOverflow question but it only solves half the problem
...ANSWER
Answered 2020-Feb-24 at 14:36You probably want something like this:
QUESTION
UPDATE: ALREADY SOLVED
I'm trying to simulate fadeInUp of animate.css using transition hooks with Velocity as in an example of vue.js docs but no luck. Can someone help me?
I've asked to the official vue.js discord channel but no one can answer
...ANSWER
Answered 2019-Dec-14 at 15:29SOLVED by myself. sandbox's updated
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Install feistel
You can use feistel like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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