What are the common key and block sizes used by AES? Decrypt the following message. What...

What are the common key and block sizes used by AES?

Decrypt the following message. What is the message? What is the cipher? What is the key? Who is the author?

ZW ERKLIV YRJ DRUV REP FEV KYZEX CVJJ JLJTVGKZSCV KYRE RCC FKYVIJ FW VOTCLJZMV GIFGVIKP, ZK ZJ KYV RTKZFE FW KYV KYZEBZEX GFNVI TRCCVU RE ZUVR, NYZTY RE ZEUZMZULRC DRP VOTCLJZMVCP GFJJVJJ RJ CFEX RJ YV BVVGJ ZK KF YZDJVCW; SLK KYV DFDVEK ZK ZJ UZMLCXVU, ZK WFITVJ ZKJVCW ZEKF KYV GFJJVJJZFE FW VMVIP FEV, REU KYV IVTVZMVI TREEFK UZJGFJJVJJ YZDJVCW FW ZK. ZKJ GVTLCZRI TYRIRTKVI, KFF, ZJ KYRK EF FEV GFJJVJJVJ KYV CVJJ, SVTRLJV VMVIP FKYVI GFJJVJJVJ KYV NYFCV FW ZK. YV NYF IVTVZMVJ RE ZUVR WIFD DV, IVTVZMVJ ZEJKILTKZFE YZDJVCW NZKYFLK CVJJVEZEX DZEV; RJ YV NYF CZXYKJ YZJ KRGVI RK DZEV, IVTVZMVJ CZXYK NZKYFLK URIBVEZEX DV. KYRK ZUVRJ JYFLCU WIVVCP JGIVRU WIFD FEV KF REFKYVI FMVI KYV XCFSV, WFI KYV DFIRC REU DLKLRC ZEJKILTKZFE FW DRE, REU ZDGIFMVDVEK FW YZJ TFEUZKZFE, JVVDJ KF YRMV SVVE GVTLCZRICP REU SVEVMFCVEKCP UVJZXEVU SP ERKLIV, NYVE JYV DRUV KYVD, CZBV WZIV, VOGREJZSCV FMVI RCC JGRTV, NZKYFLK CVJJVEZEX KYVZI UVEJZKP ZE REP GFZEK, REU CZBV KYV RZI ZE NYZTY NV SIVRKYV, DFMV, REU YRMV FLI GYPJZTRC SVZEX, ZETRGRSCV FW TFEWZEVDVEK FI VOTCLJZMV RGGIFGIZRKZFE. ZEMVEKZFEJ KYVE TREEFK, ZE ERKLIV, SV R JLSAVTK FW GIFGVIKP.

Expert Solution

By this AES algorithm we can decrypt the above encoded message.

Message :

A message is a human understandable code or text which human being can easily remember those message.

Key:

a key is a variable value that is applied using an algorithm to a string or block of unencrypted text to produce encrypted text, or to decrypt encrypted text. The length of the key is a factor in considering how difficult it will be to decrypt the text in a given message.

Cipher:

A cryptographic algorithm, or cipher, is a mathematical function used in the encryption and decryption process. A cryptographic algorithm works in combination with a key-a word, number, or phrase-to encrypt the plaintext. The same plaintext encrypts to different cipher text with different keys.

Author :

An author is authorized user who sends a message into different encoded form

venereology answered 1 month ago

AES has a larger block and key length compared to DES. If we ever had to...

AES has a larger block and key length compared to DES. If we ever had to do multiple encryptions with AES because we had computers fast enough to brute force a 128-bit key, would we need to move to Two-AES or Triple-AES?

Use Vigenère Cipher to decrypt the following plaintext with the given key key: deceptivedeceptivedeceptive plaintext: wearediscoveredsaveyourself

Given the following code for AES Electronic Code Block implementation for the encryption functionality. Modify the...

Given the following code for AES Electronic Code Block implementation for the encryption functionality. Modify the code to create a function named ‘encryptECB(key, secret_message)’ that accepts key and secret_message and returns a ciphertext. #Electronic Code Block AES algorithm, Encryption Implementation from base64 import b64encode from Crypto.Cipher import AES from Crypto.Util.Padding import pad from Crypto.Random import get_random_bytes secret_message = b" Please send me the fake passport..." password = input ("Enter password to encrypt your message: ") key= pad(password.encode(), 16) cipher...

4. Given the following code for AES Electronic Code Block implementation for the encryption functionality. Modify...

4. Given the following code for AES Electronic Code Block implementation for the encryption functionality. Modify the code to create a function named ‘decryptECB(key, ciphertext)’ that accepts key and ciphertext and returns a plaintext. from base64 import b64decode from Crypto.Cipher import AES from Crypto.Util.Padding import pad from Crypto.Util.Padding import unpad # We assume that the password was securely shared beforehand password = input ("Enter the password to decrypt the message: ") key= pad(password.encode(), 16) ciphertext = input ("Paste the cipher...

Based on Rectangle transposition techniques, decrypt the following cipher text “LTHBPEEMOSRAIAESIGCVDENTUUBWEFSONES”. Then use the same key...

Based on Rectangle transposition techniques, decrypt the following cipher text “LTHBPEEMOSRAIAESIGCVDENTUUBWEFSONES”. Then use the same key to encrypt the following plain text “the automorphism group is more difficult”. there is no given key

Question 5: How public key encryption is used to ensure confidentiality of a message. Use a...

Question 5: How public key encryption is used to ensure confidentiality of a message. Use a diagram to explain.

DES (a) What does Lucifer have in common with the DES? (b) What are the sizes...

DES (a) What does Lucifer have in common with the DES? (b) What are the sizes of the block and key space of the DES? (c) What does EFF stand for and what does it have to do with the DES? (d) What is DESX? (e) What is the key size of DES? What is the block size of DES? How many rounds are there in DES?

· What are the key characteristics common to all bonds and some key optional provisions...

· What are the key characteristics common to all bonds and some key optional provisions that bonds may have?

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...

At the end of 2020, the records of Block Corporation reflected the following. Common stock, $5...

At the end of 2020, the records of Block Corporation reflected the following. Common stock, $5 par, authorized 500,000 shares Outstanding January 1, 2020, 400,000 shares $2,000,000 Sold and issued April 1, 2020, 2,000 shares 10,000 Issued 5% stock dividend, September 30, 2020; 20,100 shares 100,500 Preferred stock, 6%, $10 par, nonconvertible, noncumulative, authorized 50,000 shares Outstanding during year, 20,000 shares 200,000 Paid-in capital in excess of par, common stock 180,000 Paid-in capital in excess of par, preferred stock 100,000...

Question