6 Comments on “What is the IV key size used in WPA2?”

1. Sanjay Ghosh says:

   August 20, 2012 at 4:19 pm

   A 256-bit WEP system is available from some vendors.
   As with the other WEP-variants 24 bits of that is for IV, leaving 232 bits for actual protection.
   These 232 bits are typically entered as 58 hexadecimal charcters ((58 x 4 bits) 232 bits) + 24 IV
   bits =256-bit WEP key.

2. Sanjay Ghosh says:

   August 20, 2012 at 4:20 pm

   SO Answer is B (24)

3. Me says:

   September 30, 2012 at 4:30 pm

   question is WPA, not WEP, IV changed to 48 bits with WPA

4. Me1 says:

   October 6, 2012 at 4:25 am

   Improved data encryption: this is done through the Temporal
   Key Integrity Protocol (TKIP), which includes a hashing
   algorithm that shuffles the keys. It also uses an integrity-checking
   feature to ensure that the keys have not been altered.[4] Even
   though “TKIP does use the RC4 stream cipher and all parties
   must share the same secret key,”[4] this key, called the Temporal
   Key (TK) must be 128 bits long, much longer than that used in
   WEP, which is only 40 bits long. Just like WEP, it uses an IV,
   but this is 48 bits long, double the size that is used in WEP.
   “Even if the TK is shared, all involved parties generate a different
   RC4 key stream.”[4] TKIP is also known as “per-packet keys,”
   which means that it “dynamically generates a new key for each
   packet created,” which prevents collisions.

5. nunya says:

   November 20, 2015 at 5:18 am

   d 48

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