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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

09/25/05

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

• Record Integrity

– Insure data was unaltered during transmission

• Authentication

– Assure the Identity of the recipient

• Confidentiality

– 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.

One-way Encryption

• 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 theft.

• 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

Wired Encryption Standards

DES vs. AES Key sizes

Wireless Encryption Standards

Other types of Encryption/Security available

iNET 900 Radio

Public VS. Private Key Encryption..

( Image Taken From http://www.pgpi.org/doc/pgpintro/ )

Secure Networking Environment

**• iNET is NOT interoperable with 802.11 standard products**

– Operates in 900 MHz band. Not 2.4 GHz

• Proprietary frequency hopping spread spectrum

– Network address required to synchronize to hop pattern

• 15 character alpha-numeric network address

– Set when radio configured and never transmitted over the air

– Determines unique pseudo random hop pattern

• Protection from unauthorized access

– Authentication and authorization denies access to unauthorized radio

– Authorized remote access lists in AP by MAC address

• Protection from rogue Access Point

Authorized AP access Lists in remotes by MAC address

For more information on Encryption Check this guys site out its pretty extensive. CLICK.. Keep in mind this article is design for a high level fundamentally point of view for specifics the link will do nicely....

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