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OCR Computer Science A Level: Lossless Compression & Encryption Algorithms

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OCR Computer Science A Level: Lossless Compression & Encryption Algorithms
  • Lossy compression permanently loses data to reduce file size
  • Lossless compression records patterns without losing data
  • Symmetric encryption uses the same key for encryption and decryption
  • Asymmetric encryption uses different keys for encryption and decryption
  • Hashing is used to convert hash keys to hash values, essential for data security

11/01/2023

1183


<h3 id="lossycompression">Lossy Compression</h3>
<p>Lossy compression refers to a method of compression where data is permanently lost when

<h3 id="lossycompression">Lossy Compression</h3>
<p>Lossy compression refers to a method of compression where data is permanently lost when

View


<h3 id="lossycompression">Lossy Compression</h3>
<p>Lossy compression refers to a method of compression where data is permanently lost when

View


<h3 id="lossycompression">Lossy Compression</h3>
<p>Lossy compression refers to a method of compression where data is permanently lost when

View


<h3 id="lossycompression">Lossy Compression</h3>
<p>Lossy compression refers to a method of compression where data is permanently lost when

View


<h3 id="lossycompression">Lossy Compression</h3>
<p>Lossy compression refers to a method of compression where data is permanently lost when

View


<h3 id="lossycompression">Lossy Compression</h3>
<p>Lossy compression refers to a method of compression where data is permanently lost when

View


<h3 id="lossycompression">Lossy Compression</h3>
<p>Lossy compression refers to a method of compression where data is permanently lost when

View


<h3 id="lossycompression">Lossy Compression</h3>
<p>Lossy compression refers to a method of compression where data is permanently lost when

View


<h3 id="lossycompression">Lossy Compression</h3>
<p>Lossy compression refers to a method of compression where data is permanently lost when

View

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Knowunity is the #1 education app in five European countries

Knowunity has been named a featured story on Apple and has regularly topped the app store charts in the education category in Germany, Italy, Poland, Switzerland, and the United Kingdom. Join Knowunity today and help millions of students around the world.

Ranked #1 Education App

Download in

Google Play

Download in

App Store

Knowunity is the #1 education app in five European countries

4.9+

Average app rating

13 M

Pupils love Knowunity

#1

In education app charts in 12 countries

950 K+

Students have uploaded notes

Still not convinced? See what other students are saying...

iOS User

I love this app so much, I also use it daily. I recommend Knowunity to everyone!!! I went from a D to an A with it :D

Philip, iOS User

The app is very simple and well designed. So far I have always found everything I was looking for :D

Lena, iOS user

I love this app ❤️ I actually use it every time I study.

OCR Computer Science A Level: Lossless Compression & Encryption Algorithms

  • Lossy compression permanently loses data to reduce file size
  • Lossless compression records patterns without losing data
  • Symmetric encryption uses the same key for encryption and decryption
  • Asymmetric encryption uses different keys for encryption and decryption
  • Hashing is used to convert hash keys to hash values, essential for data security

11/01/2023

1183

 

12/13

 

Computer Science

50


<h3 id="lossycompression">Lossy Compression</h3>
<p>Lossy compression refers to a method of compression where data is permanently lost when

<h3 id="lossycompression">Lossy Compression</h3>
<p>Lossy compression refers to a method of compression where data is permanently lost when

<h3 id="lossycompression">Lossy Compression</h3>
<p>Lossy compression refers to a method of compression where data is permanently lost when

<h3 id="lossycompression">Lossy Compression</h3>
<p>Lossy compression refers to a method of compression where data is permanently lost when

<h3 id="lossycompression">Lossy Compression</h3>
<p>Lossy compression refers to a method of compression where data is permanently lost when

<h3 id="lossycompression">Lossy Compression</h3>
<p>Lossy compression refers to a method of compression where data is permanently lost when

<h3 id="lossycompression">Lossy Compression</h3>
<p>Lossy compression refers to a method of compression where data is permanently lost when

<h3 id="lossycompression">Lossy Compression</h3>
<p>Lossy compression refers to a method of compression where data is permanently lost when

<h3 id="lossycompression">Lossy Compression</h3>
<p>Lossy compression refers to a method of compression where data is permanently lost when

<h3 id="lossycompression">Lossy Compression</h3>
<p>Lossy compression refers to a method of compression where data is permanently lost when

Can't find what you're looking for? Explore other subjects.

Knowunity is the #1 education app in five European countries

Knowunity has been named a featured story on Apple and has regularly topped the app store charts in the education category in Germany, Italy, Poland, Switzerland, and the United Kingdom. Join Knowunity today and help millions of students around the world.

Ranked #1 Education App

Download in

Google Play

Download in

App Store

Knowunity is the #1 education app in five European countries

4.9+

Average app rating

13 M

Pupils love Knowunity

#1

In education app charts in 12 countries

950 K+

Students have uploaded notes

Still not convinced? See what other students are saying...

iOS User

I love this app so much, I also use it daily. I recommend Knowunity to everyone!!! I went from a D to an A with it :D

Philip, iOS User

The app is very simple and well designed. So far I have always found everything I was looking for :D

Lena, iOS user

I love this app ❤️ I actually use it every time I study.