Explain difference between stream cipher and block cipher.
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- State the difference between block cipher and stream cipher.Step 1 Intro Cipher block chaining mode in DES (Date Encryption Standard): It is a type of cipher mode where all the cipher blocks are chained to avoid the replacement of blocks. In this model, all the blocks are chained before encryption; the plaintext in a block is XOR (Exclusive OR) with a cipher text of the previous bloc. Here, the key advantage is that the output present in the cipher text block is not the same as the plaintext block. arrow_forward Step 2 Solution: Cipher feedback mode in DES (Data Encryption Standard): This type of mode is used to encrypt the data by byte-to-byte. It is similar to the cipher block chaining mode, if the encryption process in cipher block chaining is reversed, it is the decryption process of Cipher feedback mode. During the encryption process, one byte is encrypted first and sent out. Then the encryption process is carried out with the next byte. Conclusion: The output stream generated by the encryption process in cipher…Explain what the following lines of code do pad = len(byteblock)%16 * (-1)byteblock_trimmed = byteblock[64:pad]ciphertext = cipher.encrypt(byteblock_trimmed)ciphertext = byteblock[0:64] + ciphertext + byteblock[pad:]
- Experimenting with AES-”S symmetric key cipher. Note: You may use any programming language that provided libraries for AES. Descrion: This assignment consists of two parts:PART 1: write a program that uses AES-12/1 to decrypt a message. The program should be named "decrypt", and should deal with three files that contain the encrypted text as a stream of bytes, the 128-bit key for decryption stored as a stream of bytes, and file outcome of the decryption, respectively. o To test this program, here's an example of an encrypted message a. its 128-bit secret key PART 2: you will try to use "brute force" to decrypt an encrypted message, where you only have Sirrst 96-bits of the 12S-bit secret key (last 9 bytes of the secret key are he program should be called "findk", and should deal with two files that contain the encrypted text as a stream of bytes and the first 96-bits of the key, respetively. The program should decryptedn standard the the missing h6177 of the key in hexadecimal,…Goal:Experimenting with AES-128 symmetric key cipher. Note:Using Python programming language that provided libraries for AES. Description:PART 1: write a program that uses AES-128 to decrypt a message. The program should be named "decrypt", and should deal with three files that contain the encrypted text as a stream of bytes, the 128-bit key for decryption stored as a stream of bytes, and the outcome of the decryption, respectively.- To test this program, here's an example of an encrypted message (ciphertext.dat) and its 128-bit secret key (key.dat). PART 2: you will try to use "brute force" to decrypt an encrypted message, where you only have the first 96-bits of the 128-bit secret key (last 4 bytes of the secret key are missing!) The program should be called "findk", and should deal with two files that contain the encrypted text as a stream of bytes and the first 96-bits of the key, respectively. The program should print out on standard output the missing 4 bytes of the key in…RC4 Decryption/ Complete of RC4 program by writing the decryption part of the cipher?
- A [answer] cipher is typically implemented by performing a AND mathematical operation at least two bytes at a time. A. stream B. DES C. key D. blockAnswer the following Questions ; Overload delete operator using cpp Write advantages of overloading new and delete operator. Do not Spam if you are real expert. Even Single line Should not be Copied[Estimate time to solve this question is 5 minutes] Вов ALICE Yes Message (m) Hash Function MD Alice public-key Alice private-key Hash Same? Function MD Public-key Decryption Public-key Encryption MD E( Private-Keyalice MD) + message It is very handy and practical to use the digital signature scheme that is shown in the scenario above as part of the network security protocol suits. But it has two very specific weaknesses that can be solved using the MAC scheme. Explain these 2 weaknesses that can be solved using the MAC scheme.
- Two applications of Hash functions are message authentication and a. Encryption/Decryption b. Key Exchange c. Digital Signatures d. CertificatesExplain the differences between the block cypher and the stream cypher in terms of how and why keys are exchanged.What does this say about the security of using the congruential generator as the keystream generator for a stream cipher?