encoding-decoding

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Recent articles

Text File Compression And Decompression Using Huffman Coding

Last Updated: 25 April 2023

Text files can be compressed to make them smaller and faster to send, and unzipping files on devices has a low overhead. The process of encoding involves changing the repr...read more

Huffman Coding

Algorithms

encoding-decoding

DSA

Program to perform a letter frequency attack on a monoalphabetic substitution cipher

Last Updated: 30 January 2023

Given a string S of size N representing a monoalphabetic cipher, the task is to print the top five possible plain texts that can be decrypted from the given monoalphabetic ...read more

Implementation of Vernam Cipher or One Time Pad Algorithm

Last Updated: 30 October 2023

One Time Pad algorithm is the improvement of the Vernam Cipher, proposed by An Army Signal Corp officer, Joseph Mauborgne. It is the only available algorithm that is unbre ...read more

Technical Scripter 2020

DSA

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Decode the string encoded with the given algorithm

Last Updated: 31 May 2021

Given a decoded string str which was decoded with the following encoding algorithm:Write down the middle character of the string then delete it and repeat the process unti ...read more

Strings

encoding-decoding

DSA

Program to Encrypt a String using ! and @

Last Updated: 27 March 2023

Given a string, the task is to encrypt this string using ! and @ symbols, alternatively. While encrypting the message the encrypted format must repeat the symbol as many t ...read more

Find k-th character of decrypted string | Set - 2

Last Updated: 21 April 2021

Given an encoded string where repetitions of substrings are represented as substring followed by count of substrings. For example, if encrypted string is "ab2cd2" and k=4, ...read more

Strings

Data Structures

encoding-decoding

String-Run Length Encoding

DSA

Basic Type Base64 Encoding and Decoding in Java

Last Updated: 18 October 2021

Base 64 is an encoding scheme that converts binary data into text format so that encoded textual data can be easily transported over network un-corrupted and without any d ...read more

Python | Message Encode-Decode using Tkinter

Last Updated: 06 July 2021

Prerequisite : Basics of TkinterPython offers multiple options for developing GUI (Graphical User Interface). Out of all the GUI methods, tkinter is most commonly used met...read more

Morse Code Implementation

Last Updated: 18 April 2023

Morse code is a method of transmitting text information as a series of on-off tones, lights, or clicks that can be directly understood by a skilled listener or observer wi...read more

Strings

encoding-decoding

DSA

Polybius Square Cipher

Last Updated: 15 September 2023

A Polybius Square is a table that allows someone to convert letters into numbers. To make the encryption little harder, this table can be randomized and shared with the re...read more

Strings

encoding-decoding

DSA

Encryption vs Encoding vs Hashing

Last Updated: 27 June 2023

Pre-Requisite: Encryption, Encoding, Hashing.Encryption, Encoding, and Hahsing are similar kinds of things and have little difference between them. They all are used to ch...read more

Misc

encoding-decoding

DSA

Encoding a word into Pig Latin

Last Updated: 22 July 2022

Design a program to take a word as an input, and then encode it into Pig Latin. A Pig Latin is an encrypted word in English, which is generated by doing the following alte ...read more

Last Updated: 07 April 2023

We have discussed Huffman Encoding in a previous post. In this post, decoding is discussed.Examples:Input Data: AAAAAABCCCCCCDDEEEEEFrequencies: A: 6, B: 1, C: 6, D: 2, E: ...read more

Efficient Huffman Coding for Sorted Input | Greedy Algo-4

Last Updated: 06 November 2023

We recommend to read following post as a prerequisite for this.Greedy Algorithms | Set 3 (Huffman Coding)Time complexity of the algorithm discussed in above post is O(nLog ...read more

Huffman Coding | Greedy Algo-3

Last Updated: 11 September 2023

Huffman coding is a lossless data compression algorithm. The idea is to assign variable-length codes to input characters, lengths of the assigned codes are based on the fr...read more

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