Cryptography is the practice and study of hiding information. It involves encrypting plain text into unintelligible cipher text using an algorithm or key, and decrypting cipher text back into plain text. There are two main types of cryptography: symmetric key cryptography which uses the same key to encrypt and decrypt, and asymmetric key cryptography which uses different keys. Cryptography improves security, keeps communications private, and ensures privacy by encoding messages in a way that can only be read by those possessing the decryption key.

1. Cryptograph
y
Shubham
kumar

2. Contents
• What is cryptography?
• Encryption and
Decryption
• Types of Cryptography
• Conclusion
• Thank You

3. What is Cryptography ?
 Derived from a Greek word called “Kryptos”
which means “Hidden Secrets”.
 Practice and study of hiding information.
 Science of coding and decoding

4. Encryptio
n Converting plain text to
unintelligible
format(cipher text).
Decryptio
n The process of converting
cipher text into a plain text is
called Decryption.
 It is reverse of encryption.

5. Types of Cryptography
• Similar key for
encryption and
decryption.
• e.g. ceaser cipher,
vigenere cipher
Symmetric
key
cryptography
• Different key for
encryption and
decryption.
• e.g. RSA
Asymmetric
key
cryptography

6. Conclusion
 Improves security of internet.
 Keeps privacy secure
 It hides the message and your privacy is
safe
 No one would be able to know what it
says unless there's a key to the code
 Takes a long time to figure out the code
 It takes long to create the code
 OVERALL CRYPTOGRAPHY IT'S A LONG
PROCESS

7. For every lock there is a key…
It is better to safe your lock
than the key