The basics of Cryptography
When Julius Caesar sent messages to his generals, soldiers and his council. He did not trust any messengers. So he came up with an idea to add a cypher to his handwritten texts, so he replaced every A in his message with a D, every B with an E. So on through the alphabet. Only someone who knew the “shift by 3” rule could decpher his messages.
-This is where it all begun.
Encryption and decryption
Data that can be read, seen ander understood without any security or special measures is called plaintext or cleartext. As soon as we add security or a method of disguising plaintext it is called encryption. Encrypting plaintext or cleartext results in a algoritm of numbers and letters, this is called ciphertext.
What is crypthography?
Cryptography is the science of using mathematics and algorithms to encrypt and decrypt; files, data, pictures, messages, and partitions. Cryptography enables you to store sensitive information or transmit it across inscure networks(World Wide Web) so it is not under risk to be intercepted or read by someone other than the intended recipient. Encryption is the science of securing data.
There are two kinds of cryptography in this world: That will stop your friends from reading your dayjournal, and that will stop major governments from reading your files.
How secure is PGP?
PGP can be strong or weak. Encryption’s strength is measured in the time and resources it would require you to encrypt/decrypt a file and send this.
Strong encryption is verry difficult to decipher without possession of the right keys. Combine every single computer on the world and it would still not have enough power to decrypt. Even if it took 5- million years.
Keymanagement and PGP encryption
PGP encryption is very fast and therefore has alot of benefits. Specially usefull for encrypting data that is not going anywhere. It is still smart to encrypt your data even if it’s on a USB or sitting on your computer.