1. A
PRESENTATION ON
“DATA
ENCRYPTION”
Presented by: Anu bala
Roll no 3373

2. 
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Data encryption definition.
Types of data encryption.
Difference between symmetric and asymmetric.
Encryption Methods.
Data Encryption Standard (DES).
Public Key Cryptosystem
CONTENT

3. 
Data encryption refers to mathematical
calculations and algorithmic schemes that
transform plaintext into cyphertext, a form that
is non-readable to unauthorized parties. The
recipient of an encrypted message uses a key
which triggers the algorithm mechanism to
decrypt the data, transforming it to the original
plaintext version
Data encryption definition

4. Data encryption

5. *plaintext
*encryption algorithm
*public and private key
*cipher text
* decryption algorithm
A public key encryption
scheme has six ingredients

6. 
In symmetric
(Single key):
The encryption
and decryption keys
are the same.
Types of data encryption

7. .
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Symmetric key
encryption is also
known as private
encryption, because it
uses the same key and
same cryptographic
algorithm to encrypt
and decrypt data.

8. A symmetric encryption scheme
has five ingredients

* Plaintext
* Encryption Algorithm
* Secret key
* Cipher Text
* Decription

9. 
In asymmetric
(two keys):
The encryption
and decryption
keys are
different.
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The symmetric one key is used for symmetric
and a symmetric but in asymmetric different
keys are use for encryption and description.
In symmetric, sender and receiver must share
the algorithm and key but in a symmetric
sender and receiver must have one matched
pair of keys.
In symmetric key must be kept secret but in
asymmetric two keys must of kept secret.
Difference b/w Asymmetric &
Symmetric Encryption

12. Thanks