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This article is another informative type. All of the information is from a networking class this is based on a project. My hopes is for our community to get a slightly better grasp on why what and how Encryption works.. Feel free to send me an e-mail with any question or comments. Hope you guys enjoy the info..
What Is Encryption
Encrytion is the coding or scrambling of information so that it can only be decoded and read by someone who has the correct decoding key. Encryption is used in secure Web sites as well as other mediums of data transfer. If a third party were to intercept the information you sent via an encrypted connection, they would not be able to read it. So if you are sending a message over the office network to your co-worker about how much you hate your job, your boss, and the whole dang company, it would be a good idea to make sure that you send it over an encrypted line.
"Cryptography is the science of using mathematics to encrypt and decrypt data. Cryptography enables you to store sensitive information or transmit it across insecure networks (like the Internet) so that it cannot be read by anyone except the intended recipient.
While cryptography is the science of securing data, cryptanalysis is the science of analyzing and breaking secure communication. Classical cryptanalysis involves an interesting combination of analytical reasoning, application of mathematical tools, pattern finding, patience, determination, and luck. Cryptanalysts are also called attackers.
Cryptology embraces both cryptography and cryptanalysis." (Taken From http://www.pgpi.org/doc/pgpintro/ )
Why do we need Encryption
Insure data was unaltered during transmission
Assure the Identity of the recipient
– Privacy of a persons data
Types of Encryption
Secret Key Symmetric
– Simple mentality both users have passwords to lock and unlock the data
• Public Key
Two key involved generally used in the internet
One Way Function
– This uses a certification or digital signature to verify recipients identity.
Secret Key Encryption
Symmetric key – same password to encrypt and decrypt
Requires an algorithm and a key
Algorithm is not necessarily complex
Short coming – password exchange
• General application – password protection on devices such as routers and hard drives.
Password file may be stolen defeating the basses for the security
system. Thus one-way or password file encryption is used.
One-way allows the user login to be encrypted and stored using
the same encryption.
It is impossible to reverse the encryption preventing login id
• This also can be used for creating digital signatures.
Public Key Encryption
Source for the public key has an unlock for data sent from
senders to the source. No one else can see the decrypted information.
Generally used in Banking or Internet transactions.
Associated Encryption Acronyms
vs. AES Key sizes
types of Encryption/Security available
iNET 900 Radio
Public VS. Private Key Encryption..
( Image Taken From http://www.pgpi.org/doc/pgpintro/ )
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