Its the process of making information incoherent to the unauthorized reader. It involves the manipulation or substitution of data by means of a mathematical algorithm. Encryption is the process where user puts an input plain text into a codified algorithm and key to got an output of encrypted text.
Let take an example of most commonly used encryption techniques.
Let say I have to send a message to my friend and I want nobody else to understand that let my text be
I LOVE CRYPT-MElets just jumble words to create a ciphered message.
ciphered message is : J MPWF DSZQU-NF
so, hoe to decrypt this its quite easy,
- just change the alphabet with its predecessor alphabet.
- you will get the original decrypted message.
Encryption is done in order to send messages with out letting others know what you are actually sending. Without key message seems meaning less.
You can also encrypt your messages and can send it to your friends, just give it a try.
You can carry out complex encryption for your messages here, this could be helpful if you are posting anything one your blog and want only few people to read it, or sending some text to your friend.
http://infoencrypt.com/
just fill up the message provide a password. The text will be encrypted, provide your friend with password and he could again decrypt it.
Try this one:
859phAQQH26luPIXcJuO2cOELsaTBHzhReGHkns82Ggg7RpafApp2gSK9W3EJAMz
this is a encrypted message visit infoencrypt.com and as password enter 123456, you will have the decrypted message specially for you.
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