Entered Answer Preview Result 91 152 91 152 incorrect incorrect At least one of the answers above is NOT correct. (1 point) Suppose the public parameters for an instance of the RSA cryptosystem are N = 346 and e = 3. Encrypt the message x = : 97. 91 Encrypt the message x = 178. 152

Suppose the public parameters for an instance of the RSA cryptosystem are N = 6767 and e = 7. Encrypt the messagez = 6105. Encrypt the message z = 5329.

Exercise - 2 2: In a public key, cryptosystem using RSA algorithm, user uses two prime numbers 5 and 7. He chooses 11 as Encryption key, find out decryption key. What will be the cipher text, if the plaintext is 2? Decrypt the cipher text, what will be the value of plain text? Exercise

Cryptography: Alice and Bob are going to establish a secure session key utilizing Diffie-Hellman key exchange. The agreed upon public prime is, 10477, Alice’s secret is 997, Bob’s secret is 1137. The public base is 31.  What is their session key?

Cryptography is the study of protecting information. A cipher is a pair of algorithms ―the first algorithm encrypts a message and the second algorithm decrypts the message. In most cases, a unique key is also required to encode or decode plaintext. The Caesar cipher is one of the simplest and most widely known ciphers. It is named after Julius Caesar who allegedly used it to protect important military directives. Every letter in the plaintext is replaced by a letter N positions down the alphabet. For example, if N = 3, then a => d and b => e. While the idea is remarkably simple, it appeared to work in Ancient Rome. Most people there couldn't read, and those who could simply assumed it was a foreign language. Write a program that implements the Caesar cipher. You program will get from standard input the key N, followed by a line of plaintext. . . The key N should be any integer between 0 and 26 inclusive. If this isn't the case, print an error message and quit. Any numbers or…

You are given the following parameters in RSA cryptosystem: p = 11, q = 13, e = 13         a) Find the integer d.         b) List down the public key and private key. You need to encrypt the plaintext message, M = OF.       c) Convert this message to value according to ASCII table.      To encrypt this message, you can either combine the value, or    separate it into the blocks of 2 digits (Hint: it must satisfy the condition M < n).       d) Encrypt and decrypt the message OF.       e) If the decimal value (not character) of ciphertext is 188267, decrypt this value and convert it to an appropriate message according to the ASCII table.

In a public key, cryptosystem using RSA algorithm, user uses two prime numbers 5 and 7. He chooses 11 as Encryption key, find out decryption key. What will be the cipher text, if the plaintext is 2? Decrypt the cipher text, what will be the value of plain text?

In cryptography, the Caesar cipher is a type of scroll cipher and is one of the simplest and best-known ciphers. When encrypting a message in the Caesar cipher, each letter is usually replaced by the letter three letters in the alphabet. Let the alphabetic scrollback look like this: aw w ww ww m ww w ww w vwwwwwww www ww wwm w w wwwm www ww defg hijkI mnop 9rstuvwxy z abc a bcd efghilj kI P9rstu v w xy z m Keep the encryption in the Python dictionary structure. www ww Write a Python program that takes the three-letter message as input and prints the encrypted message. Guidance: An empty string can be inserted one by one by replacing the letters of the input. wwwwwwwwwww www wn ww wn ww w www wwh m Entry: Message: kar Encrypted message: hxo Entry: Message: yel Encrypted message: vbi Entry: Message: ses Encrypted message: pbp Entry: Message: mtk Encrypted message: jqh

Suppose the parameters for an instance of the RSA cryptosystem are N = 26671, e = 3, and d 17563. = Decrypt the message y Decrypt the message y = 6666. = 1576.

Question 1 Study the scenario and complete the question(s) that follow: Ceasar Cipher The Caesar Cipher technique is one of the earliest and simplest method of encryption technique. It's simply a type of substitution cipher, i.e., each letter of a given text is replaced by a letter some fixed number of positions down the alphabet. For example with a shift of 1, A would be replaced by B, B would become C, and so on. The method is apparently named after Julius Caesar, who apparently used it to communicate with his officials. 1.1 Write a Ceasar cipher algorithm in such a way that a character D is changed to N. Derive the encryption of the other characters accordingly. 1.2 Based on your algorithm, what will be the encrypted code of the message “my mother is not home". End of Question 1