encryption
DESCRIPTION
TRANSCRIPT
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ENCRYPTION
PRESENTED BY
PLT. OFF. FIZA NADEEM
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SEQUENCE
¨ INTRODUCTION
¨ HISTORY
¨ ENCRYPTION
¨ TYPES OF ENCRYPTION
¨ METHODS OF ENCRYPTION
¨ USES
¨ CONCLUSION
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INTRODUCTION
¨ CRYPTOGRAPHY:
Science of encryption and decryption; converting between plaintext and ciphertext
¨ ENCRYPTION:
Conversion of data into a form, called a ciphertext
¨ DECRYPTION
To make encrypted information readable again
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HISTORY
¨ Ancient Babylonian merchants used intaglio
¨ A piece of flat stone carved into images and writings
¨ Using this, they are producing what we today call ‘Digital Signature’
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ENCRYPTION
¨ Process of transforming information
¨ Using cipher (algorithm)
¨ Unreadable to everyone except the one having key
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TYPES OF ENCRYPTION
1. MANUAL ENCRYPTION:¨ Use of encryption software
¨ User’s participation
¨ Great for PCs
2. TRANSPARENT ENCRYPTION:¨ Most secure type of encryption
¨ Encrypts everything on computer
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TYPES OF ENCRYPTION…(cont’d)
3. SYMMETRIC ENCRYPTION:¨ Most simplest type
¨ Code up yourself
¨ Only one key needed
¨ Safe method needed for transmission of key
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TYPES OF ENCRYPTION…(cont’d)
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TYPES OF ENCRYPTION…(cont’d)
4. ASYMMETRIC ENCRYPTION:
¨ Done electronically
¨ Public key is posted for the public to encrypt
¨ Decrpytion done only by private key
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TYPES OF ENCRYPTION…(cont’d)
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METHODS OF ENCRYPTION
¨ Consists of two main categories
¨ Stream Encryption: Clear text encrypted character by character
¨ Block Cipher Encryption: Clear text encrypted block by block
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USES OF ENCRYPTION
¨ Protect information on your computer.
¨ Protect information in transit
¨ Wireless phones
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USES OF ENCRYPTION … (cont’d)
¨ Confidentiality of medical, personal and transaction records
¨ Email program
¨ Digital signature
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CONCLUSION
¨ Contrary to what most people think, encryption is not a new thing
¨ Encryption is being commonly used to facilitate secret communication
¨ Encryption is used to protect data at rest and at transit
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THANK YOU!
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Q & A