RC4 - RIVEST CIPHER 4 - STREAM CIPHER -

1. AMJAD REHMAN A

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3. • ALGORITHMS CRYPTOGRAPHY
CRYPTOGRAPHIC KEYS

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11001100 plaintext
01101100 key stream
10100000 Cipher text

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for i = 0 to 255
do
S[i] = i;
T[i] = K[i mod keylen];

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j = 0;
for i = 0 to 255
do
j = (j + S[i] + T[i]) mod 256;
Swap (S[i], S[j]);

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i, j = 0;
for (int x = 0; x < byteLen; x++)
do
i = (i + 1) mod 256;
j = (j + S[i]) mod 256;
Swap (S[i], S[j]);
t = (S[i] + S[j]) mod 256;
k = S[t];

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• SECURE SOCKETS LAYER
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HTTP://WWW.DRIZZLE.COM/~ABOBA/IEEE/RC4_KSAPROC.PDF
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HTTP://WWW.CS.RICE.EDU/~ASTUBBLE/WEP/WEP_ATTACK.PDF
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HTTP://WWW.RSASECURITY.COM/RSALABS/TECHNOTES/WEP.HTML
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HTTP://WWW.NCAT.EDU/~GROGANS/ALGORITHM_BREAKDOWN.HTM
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HTTP://WWW.SCRIBD.COM/DOC/49849673/21/RC4-ALGORITHM