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

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venereology answered 1 year ago

Write a program in javascript to encrypt and decrypt the user input using the caesar algorithm...

Write a program in javascript to encrypt and decrypt the user input using the caesar algorithm with the substitution algorithm. Specify the min and max of the message user can enter to encrypt. Specify the length of the key user can enter to encrypt and decrypt the message. document your design by words or diagrams.

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 and decrypt a phrase using two similar approaches, each insecure...

Write a Java program to encrypt and decrypt a phrase using two similar approaches, each insecure by modern standards. The first approach is called the Caesar Cipher, and is a simple “substitution cipher” where characters in a message are replaced by a substitute character. The second approach, due to Giovan Battista Bellaso (b 1505, d 1581), uses a key word, where each character in the word specifies the offset for the corresponding character in the message, with the key word...

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...

Write a Java program that uses the RC4 cipher algorithm to encrypt the following message using...

Write a Java program that uses the RC4 cipher algorithm to encrypt the following message using the word CODES as the key: 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. Ignore spaces and punctuations and put the message...

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...

Can you convert this code (Python) to C++ def decrypt(message, key): decryptedText = "" for i...

Can you convert this code (Python) to C++ def decrypt(message, key): decryptedText = "" for i in message: M = ord(i) k = int(key, 16) xor = M ^ k decryptedText += chr(xor) return decryptedText def encrypt(message, key): encryptedText = "" for i in message: M = ord(i) k = int(key, 16) xor = M ^ k encryptedText += chr(xor) return encryptedText # main function userText = input("Enter text: ") userKey = str(input("Enter a key: ")) encryptedMessage = encrypt(userText, userKey)...

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