Cryptography

What is Cryptography ?

Cryptography is a technique of encrypting the clear text data into a scrambled
code. This encrypted data is sent over public or private network toward
destination to ensure the confidentiality. This encrypted data known as
"Ciphertext" is decrypted at the destination for processing. Strong encryption
keys are used to avoid key cracking.
Types of Cryptography
There two types of cryptography :
1: Symmetric Cryptography
2: Asymmetric Cryptography

Symmetric Cryptography
The tpye  of cryptography symmetric Key Cryptography is the oldest and most widely used
cryptography technique in the domain of cryptography. Symmetric ciphers
use the same secret key for the encryption / decryption of data. Most

widely used symmetric ciphers are ABS and FES.

Asymmetric cryptography

Asymmetric cryptography, also known as public key cryptography, uses public and private keys to encrypt and decrypt data. The keys are simply large numbers that have been paired together but are not identical (asymmetric). One key in the pair can be shared with everyone; it is called the public key.

Encryption Algorithms

There are same types of  Encryption Algorithms

Ciphers

A cipher is a set of rules by which we implement encryption. 

Substitution

Simply In this method, every single character of data is substituted with another

character.

Polyalphabetic

This method makes substitution even more difficult to break by using

multiple character substitution.

Keys

Every person know that what is keys. In the above example of substitution, we used a key of “three,” Key plays the

main role in every cipher algorithm. Without knowing the key, data cannot be

decrypted.

Stream Cipher

A type of symmetric key cipher that encrypts the plain text one by one. 

Block Cipher

A type of symmetric key cipher that encrypts the plain text on the fixed

length of the group.

Data Encryption Standard (DES)

Data Encryption Algorithm (DES) is a Symmetric Key Algorithm that was

used for encryption.

Secure Hashing Algorithm (SHA)

This is as message digest 5 (MD5) is a cryptographic hashing algorithm, another

most popular, more secure and widely used hashing algorithm is Secure

Hashing Algorithm (SHA).

exp:

Syntax: The password is 12345

SHA-1: 567c552b6b559eb6373ce55a43326ba3db92dcbf

Cryptography Tools

Basic Data Encrypting Using HashCalc

Basic Data Encrypting Using MD5 Calculator

Basic Data Encrypting Using Advance Encryption Package

Basic Data Encrypting Using TrueCrypt

Basic Data Encrypting Using CrypTool

Encrypting and Decrypting the Data Using BCTextEncoder

Basic Data Encrypting Using Rohos Disk Encryption

At the end we see Mind Map