Answer:
see explaination
Explanation:
I made use of python program to solve this.
text file name with fun.txt.
6 fun. 3 hello 10 <> 2 25 4 wow!
Program code:
import re
file = open('fun.txt','r') #for reading file
strings="" #declaring empty string
for k in file:
strings=strings+k #all character in file is storing in strings variable for do operations
pattern = '\s' #for pattern \s is for space
result = re.split(pattern, strings) #split the string with space
for k in range(len(result)): #loop through the list of string
if(k%2) == 0: #checking for integer to time of string
p=int(result[k])
print(result[k+1] *p) #print times of the string(k+1)
Check attachment for output
The block cipher attack strategy that attempts to retrieve the key by performing decryption and encryption simultaneously on a understood plaintext-ciphertext pair exists plaintext attack.
<h3>What is plaintext attack?</h3>
The known-plaintext attack is a type of cryptanalysis attack in which the attacker has access to both the encrypted and plaintext versions of the target data. These can be used to reveal additional hidden information, including code books and secret keys. An attack using known plaintext occurs when the attacker has access to pairs of known plaintexts and the ciphertexts that go with them.
The objective is to figure out the secret key (or keys) or to create an algorithm that would enable him to decrypt any additional messages. Ordinary readable text before it is converted into ciphertext in cryptography is known as plaintext, as is readable text that has been recovered from encryption. Not all data inputted into or outputted by encryption methods is plaintext.
Hence, The block cipher attack strategy that attempts to retrieve the key by performing decryption and encryption simultaneously on a understood plaintext-ciphertext pair exists plaintext attack.
To learn more about cryptanalysis attack refer to:
brainly.com/question/19202523
#SPJ4
Answer:
Some of the differences that can be found in this communication means are: the time of reception and response, impression methods, presentation, resources invested, environmental impact.
Explanation:
In today's world it is possible to have endless possibilities in terms of the means of communication through which we can send a message effectively. In the past before the technological era that we are living at the moment, the most common form of communication was the business letters that were normally constituted in a very formal way since its writing, its impression, the way in which it was physically distributed its information, its envelope and the time of diffusion also had to be a little more extensive.
Now according to the technological advances and all the benefits that technology offers us, e-mail is the most efficient form of communication even for companies, who have been able to adapt satisfactorily the characteristics of the messages contained therein in order to achieve a formal communication in the same way and transmit the message in a much faster and more effective way, without having to spend on prints, luxurious envelopes and the sending of the physical document and can also leave a record of the sending of the information. In addition the e-mail can not only be used for formal communications but for any type of communication that is necessary, almost immediately and very effectively, with a low impact in the environment with less use of paper.
