1) The ciphertext ESCLXYB has been obtained by using vigenere with key= (30 , 10 ,...

1) The ciphertext ESCLXYB has been obtained by using vigenere with key= (30 , 10 , 15 , 5). Find the plaintext?

2) the ciphertext OWRTLUFXRTLFTP by affine cipher , key=(21,5) find the plaintext?

Expert Solution

venereology answered 1 year ago

1. Use a Vigenere cipher with a key of "Patton" to encrypt: "If everyone is thinking...

1. Use a Vigenere cipher with a key of "Patton" to encrypt: "If everyone is thinking alike, then somebody isn't thinking." Is this a good key? Why or why not? 2. Calculate the index of coincidence for the result. SHOW ALL WORK PLEASE

A message has been encrypted by Bob using row transposition cipher to give the following ciphertext:...

A message has been encrypted by Bob using row transposition cipher to give the following ciphertext: TTNA APTM TSUO AODW COIX KNLY PETZ However when Bob shared the key with Alice, it got copied multiple times and looks like: …. 6 7 4 3 1 2 5 6 7 4 3 1 2 5 6 7 4 3 1 2 5 6 7 4 3 1 2 5 6 7 4 3 1 2 …… You see a series of...

Suppose an attacker obtained 128 bits of ciphertext that were encrypted using an encryption algorithm whose...

Suppose an attacker obtained 128 bits of ciphertext that were encrypted using an encryption algorithm whose keys are known to be 128 bits long. How effective is an exhaustive key search if the attacker does not know the encryption algorithm used? Provide an example of when data integrity is more important than data confidentiality? Suppose you have been asked at your new job to recommend the strength of encryption needed to protect the contents of a database. Draw up a...

Cryptography: Using columnar cipher, find the plaintext and the key that generated this ciphertext: ykccjosaiawiekhriogrrlrni Keep...

Cryptography: Using columnar cipher, find the plaintext and the key that generated this ciphertext: ykccjosaiawiekhriogrrlrni Keep in mind that only letter j was used for padding. (Show your detailed work)

Using python. 1. How to create a dictionary that has an integer as a key and...

Using python. 1. How to create a dictionary that has an integer as a key and a byte as a value? the dictionary keys must contain integers from 0 to 255. It should be similar to UTF-8. When we enter an integer, it should return 1 byte. 2. Create a function when a user gives 1 byte, it should return the key from the previous dictionary.

page 231 problems 1.You pan to purchase a $100,00 home using a 30-year mortgage obtained from...

page 231 problems 1.You pan to purchase a $100,00 home using a 30-year mortgage obtained from your local credit union. The mortgage rate offered to you is 8.25%. You will make a down payment of 20 percent of the purchase price. Calculate your monthly payments on this mortgage Calculate the amount of interest and, separately, principal paid in the 25th payment.

The following information has been obtained for Sarasota Corporation. 1. Prior to 2020, taxable income and...

The following information has been obtained for Sarasota Corporation. 1. Prior to 2020, taxable income and pretax financial income were identical. 2. Pretax financial income is $1,769,000 in 2020 and $1,323,000 in 2021. 3. On January 1, 2020, equipment costing $1,236,000 is purchased. It is to be depreciated on a straight-line basis over 5 years for tax purposes and over 8 years for financial reporting purposes. (Hint: Use the half-year convention for tax purposes, as discussed in Appendix 11A.) 4....

The following information has been obtained for Culver Corporation. 1. Prior to 2017, taxable income and...

The following information has been obtained for Culver Corporation. 1. Prior to 2017, taxable income and pretax financial income were identical. 2. Pretax financial income is $1,649,000 in 2017 and $1,476,000 in 2018. 3. On January 1, 2017, equipment costing $1,140,000 is purchased. It is to be depreciated on a straight-line basis over 5 years for tax purposes and over 8 years for financial reporting purposes. (Hint: Use the half-year convention for tax purposes, as discussed in Appendix 11A.) 4....

Question 1 (36 marks, 54 minutes) Clean Inc. has been using a model 10 machine to...

Question 1 (36 marks, 54 minutes) Clean Inc. has been using a model 10 machine to manufacture and sell 2,000 pressure washers per month. Given that this machine is wearing out and, as a result of an increase in expected demand over the next several years, consideration is being given to the purchase of a larger model 20 machine. The currently owned model 10 machine will not be used in future operations but will be retained as a backup in...

1. Monoalphabetic substitution (using the Caesar Cipher tool right) Encipher (convert plaintext into ciphertext): meal times...

1. Monoalphabetic substitution (using the Caesar Cipher tool right) Encipher (convert plaintext into ciphertext): meal times  Decipher (convert ciphertext in to plaintext):  JR PHDQ JUHHQ 2. Polyalphabetic substitution (using the Vigenere Square in the lecture slide) Encipher: fall  Decipher:  VPX TWOKM

Question