1. TKIP Key Mixing Code And Vectors
November, 2002
TKIP Key Mixing Code And Vectors
David Johnston
David Johnston, Mobilian.

2. PN We now have the 48 bit PN, common to TKIP and CCMP.
November, 2002 PN
We now have the 48 bit PN, common to TKIP and CCMP.
Existing TKIP code and vectors do not adequately relate PN to TSC_[012], IV16 and IV32
David Johnston, Mobilian.

3. Reference C Code Byte Oriented Fully endian tolerant Single .c file
November, 2002
Reference C Code
Byte Oriented
Fully endian tolerant
*, % and / used for shifting and masking
Single .c file
ANSI C
ANSI Standard libraries only
A standard can be referenced to determine meaning
Compiles easily
gcc –o key_mixing key_mixing.c
David Johnston, Mobilian.

4. Vectors Makes endianess of TK Clear
November, 2002
Vectors
Makes endianess of TK Clear
Makes relationship between PN, IV32, IV16 and transmit order clear
Same results as previous vectors. No fundamental algorithm change.
David Johnston, Mobilian.

5. Vector Example Test vector #5:
November, 2002
Vector Example
Test vector #5:
TK = 98 3A 16 EF 4F AC B3 51 AA 9E CC 27 1D E2 [LSB on left, MSB on right]
TA = 50-9C-4B D9
PN = F0A410FC058C [transmitted as: 8C DefKeyID FC 10 A4 F0]
IV32 = F0A410FC
IV16 = 058C
P1K = F2DF EBB1 88D A07C
RC4KEY= C F4 D F4 D9 AF 1A 64 F1 D
David Johnston, Mobilian.

6. November, 2002
Motion
Move that the editor incorporate into the draft the text described in document r0-TKIPKeyMixingCodeAndVectors
David Johnston, Mobilian.