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aleksandrvk [35]
3 years ago
9

Public-key cryptography can be used for encryption (ElGamal for instance) and key exchange. Furthermore, it has some properties

(such as nonrepudiation) which are not offered by secret key cryptography. So why do we still use symmetric cryptography in applications?
Computers and Technology
2 answers:
SIZIF [17.4K]3 years ago
8 0

Answer:

data security and user privacy

Explanation:Symmetric algorithms provide a fairly high level of security while at the same time allowing for messages to be encrypted and decrypted quickly. The relative simplicity of symmetric systems is also a logistical advantage, as they require less computing power than the asymmetric ones. In addition, the security provided by symmetric encryption can be scaled up simply by increasing key lengths. For every single bit added to the length of a symmetric key, the difficulty of cracking the encryption through a brute force attack increases exponentially.

Rudiy273 years ago
3 0

Answer:

Advantage symmetric cryptography

Explanation:

1. The same key is used to both encrypt and decrypt messages.  

2. Symmetric key algorithms are widely applied in various types of computer systems to improve data security.

3. The security of symmetric encryption systems is based on the difficulty of randomly guessing the corresponding key to force them.

4. The Advanced Encryption Standard (AES) widely used in both secure messaging applications and cloud storage is a prominent example of symmetric encryption.

5. For every bit added to the length of a symmetric key, the difficulty of decrypting encryption using a brute force attack increases exponentially.

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A random method returns a number between zero and one.

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Given an array a, declared to contain 34 elements, write an expression that refers to the last element of the array.
Mice21 [21]
If the language is zero indexed:

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3 years ago
Write a function analyze_text that receives a string as input. Your function should count the number of alphabetic characters (a
laiz [17]

Answer:

def analyze_text(sentence):

   count = 0

   e_count = 0

   for s in sentence:

       s = s.lower()

       if s.isalpha():

           count += 1

       if s == "e":

           e_count += 1

   return "The text contains " + str(count) + " alphabetic characters, of which " + str(e_count) + " (" + str(e_count*100/count) + "%) are ‘e’."

Explanation:

Create a function called analyze_text takes a string, sentence

Initialize the count and e_count variables as 0

Create a for loop that iterates through the sentence

Inside the loop, convert all letters to lowercase using lower() function. Check each character. If a character is a letter, increment the count by 1. If a character is "e", increment the e_count by 1.

Return the count and e_count in required format

5 0
3 years ago
When using a self-contained recovery device on a cfc, hcfc, or hfc system with an operating compressor, technicians must?
Neporo4naja [7]

When using a self-contained recovery device on a cfc, hcfc, or hfc system with an operating compressor. Technicians must recover 80% of the nameplate charge.

Compressor is a mechanical device used in many industries which has the function of increasing gas pressure by reducing its volume. The air compressor is a specific type of gas compressor.

Compressors can be characterized in a number of different ways, but are usually divided into types based on the functional method used to produce compressed air or gas. The following are common compressor types. Types covered include:

  • Pistons
  • Diaphragm
  • Helical Screw
  • Slide propeller
  • Scrolling
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How to use an air compressor

  1. Position the Air Compressor
  2. Check the Oil Level
  3. Check the Drain Valve
  4. Set the PSI
  5. Prepare the Air Tank
  6. Connect the Air Hose
  7. Connect the Desired Tool
  8. Remove Excess Moisture

You can learn more about compressor here brainly.com/question/26581412

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7 0
1 year ago
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