URL
https://opencores.org/ocsvn/rc4-prbs/rc4-prbs/trunk
Subversion Repositories rc4-prbs
Compare Revisions
- This comparison shows the changes necessary to convert path
/rc4-prbs/trunk
- from Rev 11 to Rev 12
- ↔ Reverse comparison
Rev 11 → Rev 12
/rc4.inc
18,4 → 18,4
*/ |
|
|
`define KEY_SIZE 6 |
`define KEY_SIZE 8 |
/README.txt
7,7 → 7,8
1) First, issue rst |
2) Load the password byte-by-byte into the password_input port. The lenght of the password is KEY_SIZE |
3) Issue 768 clocks to perform key expansion |
4) Now you should start receiving the pseudo-random stream via the output bus, one byte per clock. To encrypt or decrypt using RC4 you simply xor your data with the output stream. |
4) Now you should start receiving the pseudo-random stream via the output bus, one byte every two clocks. The output_ready signal signals when a valid byte is present at the output K. |
To encrypt or decrypt using RC4 you simply xor your data with the output stream. |
Also you shouldn't use the first kb of stream because of a known RC4 vulnerability, so please discard those bytes. |
|
The testbench and makefile work using icarus verilog and you can peer into rc4_tb.v to see an example implementation. |