Write a small program to encrypt and decrypt a message using Python library.

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venereology answered 10 months ago

how to write program in java for encrypt and decrypt input text using DH algorithm

Hello! I'm trying to write a code that will either encrypt/decrypt a message from an inputed...

Hello! I'm trying to write a code that will either encrypt/decrypt a message from an inputed text. I'm having the absolute hardest time getting stared and figuring out how to identify in the code if the input needs to be encrypted/decrypted and identifying the string to encrypt/decrypt with. These are the instructions: Objectives Command line input File input and output Rethrowing exceptions Program Description Gaius Julius Caesar encoded his battle messages so that the opponent could not read them should...

Write a Java program to encrypt the following message using the RC4 cipher using key CODES:...

Write a Java program to encrypt the following message using the RC4 cipher using key CODES: Cryptography is a method of protecting information and communications through the use of codes so that only those for whom the information is intended can read and process it. Instead of using stream length 256, we will use length 26. When encrypting, let A = 0 to Z = 25 (hence CODES = [2 14 3 4 18]). Ignore spaces and punctuations and put...

I need the code in python where I can encrypt and decrypt any plaintext. For example,...

I need the code in python where I can encrypt and decrypt any plaintext. For example, the plaintext "hello" from each of these Block Cipher modes of Operation. Electronic Code Block Mode (ECB) Cipher block Mode (CBC) Cipher Feedback Mode (CFB) Output feedback Mode (OFB) Counter Mode (CTR) Here is an example, Affine cipher expressed in C. Encryption: char cipher(unsigned char block, char key) { return (key+11*block) } Decryption: char invcipher(unsigned char block, char key) { return (163*(block-key+256)) }

Answer in python! 5.16 LAB: Cryptographic Hashing Algorithms Encrypting text allows us to encrypt and decrypt...

Answer in python! 5.16 LAB: Cryptographic Hashing Algorithms Encrypting text allows us to encrypt and decrypt the text using a special key. Another method of encrypting text / passwords is called hashing. Hashing uses special algorithms to 'scramble' text so that it is tougher to hack. The hash function can take numbers, letters, and symbols then uses one of the special algorithms to output scrambled text. The longer the output string, the harder to hack the data. The difference between...

Note: It is possible to encrypt/decrypt problems 2-5 using online calculators. For this reason, it is...

Note: It is possible to encrypt/decrypt problems 2-5 using online calculators. For this reason, it is important that sufficient work is shown in order to demonstrate your understanding of the material. Answers which simply include the final encrypted/decrypted message but do not include all necessary steps will be awarded no credit. 1. Find the following Euler Totients using Euler’s Theorem, as explained on p.409 of the text (10 points each): a.ϕ(13) b.ϕ(81) c.ϕ(100) d.ϕ(102) 2. Use a Hill Cipher to...

Using Python, write a simple application that takes user input of plaintext and key, and encrypt...

Using Python, write a simple application that takes user input of plaintext and key, and encrypt the plaintext with Vigenere Cipher. The application should then print out the plaintext and the ciphertext.

Using Python and networkx library, choose two graphs (one with a small and the other large...

Using Python and networkx library, choose two graphs (one with a small and the other large sample size) from a data network library on the web, and read them using code. Write a script using python that reads the network data and plots the data in to a graph (using networkx).

These questions are about math cryptography 1) Encrypt the plaintext "this is a secret message" using...

These questions are about math cryptography 1) Encrypt the plaintext "this is a secret message" using the affine function f(x) = 5x + 7 mod 26. 2) Determine the number of divisors of 2n, where n is a positive integer.

Instructions from your teacher: Write a Python program that does the following: Displays a welcome message...

Instructions from your teacher: Write a Python program that does the following: Displays a welcome message Prompts a user to enter a number (an integer), and then converts that value from inches to feet. If the user entered a negative number, display an error message telling the user that it was not a "positive " number and prompt the user to enter a number again. Displays the converted value, then " feet" Continue converting the user's valid values until the...

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