Database Protection |ENCRYPTION

ENCRYPTION

INTRODUCTION- Encryption is a technique for transforming information on a computer in such a way that it becomes unreadable.So, even if someone is able to gain access to a computer with personal data on it ,they likely won't be able to do anything with the data unless they have complicated,expensive software or the original data key.

TYPES OF ENCRYPTION- Two types of encryption are-

1. SYMMETRIC METHODS
2. ASYMMETRIC METHODS 

1. SYMMETRIC METHODS-

• Symmetric encryption is also known as private-key cryptography and is called so because the key used to encrypt and decrypt the  message must remain same..
• Using this method a sender encrypts the data with one key and then sends the data (CIPHER TEXT) and the receiver use the key to decry-pt the data. 

2. ASYMMETRIC METHODS- 

• Asymmetric method or public key cryptography is different than the previous method because it uses two keys for encryption or decryption
• .A public key is freely available to everyone and is used to encrypt messages and a different private key is used by the recipient to decry-pt messages.