WPA/WPA2

From DD-WRT Wiki

Revision as of 15:43, 10 June 2007 by Gr0Yrn (Talk | contribs)
Jump to: navigation, search

cheap diazepam cheap xenical nokia ringtones qwest ringtones zanaflex online diazepam online verizon ringtones free motorola ringtones order lortab prozac online ericsson ringtones but ortho cheap cyclobenzaprine cheap celexa free ringtones phentermine free cool ringtones cheap prozac free qwest ringtones cialis online sprint ringtones nexium online real ringtones sagem ringtones tracfone ringtones free nokia ringtones free punk ringtones mp3 ringtones sony ringtones ativan online but hgh free midi ringtones alltel ringtones cheap flexeril sony ericsson ringtones motorola ringtones vicodin online free tracfone ringtones buy soma levitra online free motorola ringtones cheap didrex cheap sildenafil pharmacy online online zoloft online hydrocodone online free sony ringtones cingular ringtones viagra buy paxil ambien online buy lortab order hydrocodone vigrx online cheap ativan hgh online sildenafil online buy viagra ortho online nextel ringtones lisinopril free funny ringtones free sony ericsson ringtones buy vicodin hydrocodone order ativan mono ringtones clonazepam levitra free sprint ringtones cialis online sony ringtones cheap levitra zanaflex online phentermine celexa online ultracet online wwe ringtones free sharp ringtones buy norco soma online cheap ultracet free cingular ringtones cheap adipex cheap xenical cheap albuterol cheap tenuate cheap ortho free music ringtones sagem ringtones cheap lisinopril meridia online cheap propecia cheap vigrx cheap diethylpropion cheap albuterol mp3 ringtones meridia online free ringtones cheap ultram soma online cheap lortab cheap sildenafil free nextel ringtones cheap lorazepam free funny ringtones diethylpropion online free ringtones funny ringtones cingular ringtones cheap soma nokia ringtones clonazepam online zyban online clomid online buy prozac online valium order lisinopril meridia online buy tramadol sharp ringtones free midi ringtones flexeril online real ringtones celexa online zoloft online free nextel ringtones ericsson ringtones free music ringtones mtv ringtones order ultram buy valium viagra online lorazepam online cheap cialis cheap phentermine buy nexium samsung ringtones cheap norco meridia online sprint ringtones buy rivotril order carisoprodol carisoprodol online cyclobenzaprine online free qwest ringtones free qwest ringtones cheap fioricet verizon ringtones punk ringtones cheap hoodia pharmacy online online tracfone ringtones tramadol cheap rivotril tramadol online didrex online cheap fioricet music ringtones cheap albuterol free nokia ringtones buy viagra buy alprazolam buy xenical pharmacy online online free funny ringtones order zanaflex free ericsson ringtones cyclobenzaprine online adipex online cheap xanax free alltel ringtones free qwest ringtones ultram online sonyericsson ringtones free samsung ringtones cheap lortab free mono ringtones free samsung ringtones zyban online cheap celexa free funny ringtones wwe ringtones cheap rivotril but clomid buy fioricet buy hgh cheap lipitor cheap hoodia clonazepam online cool ringtones tenuate online cheap vicodin real ringtones free sonyericsson ringtones buy hoodia buy tramadol nextel ringtones cheap alprazolam ambien online WPA was the first step to the 802.11i standard, and WPA2 is the next advancement to the ratification of 802.11i. WPA uses AES and TKIP. Now you may be wondering "Why do we have two forms of encryption??"

Well TKIP (Temporal Key Integrity Protocol) really isn't a form of encryption, but rather provides:

  • Message Integrity
  • Re-keying mechanism
  • Per packet key mixing

You may be wondering what that means, so let's break it down.

Message Integrity is used to ensure that an error or third party isn't tampering with the data being transmitted. Using a Hashing algorithm, it is possible to create a unique hash of the data being transmitted. This is created by the sender, then the data is recalculated on the other side in order to ensure that the message integrity hasn't been compromised. Re-keying and per-packet key mixing, are means of changing the encryption key at a set interval. Rather than simply use one key to encrypt all messages, keys referred to as subkeys are generated from a master key. This ensures that the key used to encrypt the message is not vulnerable due to the fact that the key is constantly changing. Even if the hacker was able to gain access to the current key being used, he/she would have to obtain the master key in order to know the next key being used.

Advanced Encryption Standard (AES) is the actual encryption being used. If you're familiar with encryption algorithms, you should know that DES (Data Encryption Standard) was replaced by AES as the defacto standard.

Now the main difference between WPA and WPA2 is the change from TKIP to Counter Mode CBC MAC Protocol (or CCMP). CCMP is a more secure and scalable solution compared to the previous TKIP method. When 802.11i is ratified, CCMP will probably be part of it, rather than TKIP.

Of course this is a very basic overview of WPA vs WPA2. If you want more information about how the algorithms work, I would suggest the following links:

Cipher Blocks
Wikipedia CCMP
Wikipedia AES
Wikipedia TKIP
Wikipedia WPA
Wikipedia on WPA2

If you really want to learn more about wireless encryption, I would highly suggest you read Real 802.11 Security: Wi-Fi Protected Access and 802.11i by Jon Edney, William A. Arbaugh ISBN: 0321136209B06242003

This book covers, in detail, all methods of encryption and authentication used by 802.11. Be warned, it is very technical.


The question was asked: "WPA2 Pre-Shared Key Only" vs. "WPA2 Pre-Shared Key Mixed" What is the difference? Is "Mixed" WPA and WPA2???

BrainSlayer replied: 24 Dec 2005 23:16 In mixed mode, the unit tries wpa2 first and if its fails it uses wpa1














[l_sp_26]

pergo laminate flooring installing laminate floor paperless payday loan No Telecheck Payday Loan ics payday loan Tankless Water Heater