APRESENTATION ON“DATA ENCRYPTION”

Presented by: Anu balaRoll no 3373

Data encryption definition. Types of data encryption. Difference between symmetric and

asymmetric. Encryption Methods. Data Encryption Standard (DES). Public Key Cryptosystem

CONTENT

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

Data encryption

*plaintext*encryption algorithm*public and private key*cipher text* decryption algorithm

A public key encryption scheme has six ingredients

Types of data encryption

In symmetric (Single key):

The encryption and decryption keys are the same.

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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.

* Plaintext * Encryption Algorithm

* Secret key* Cipher Text* Decription

A symmetric encryption scheme has five ingredients

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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

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