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???
06/09/06 20:08
Modified:
  06/09/06 21:06

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#118121 - If anyone wants to play with it
Responding to: ???'s previous message
I have put a hardware implementation of the RC4 pseudo random number generator in the hardware library it can be used as it stands as a psbr or as the basis of a stream cipher by simply EXORing your plain/cipher text stream with the output of the rng.It produces a 20 bit pseudo random number every ten clock cycles and should fit into a cheapo CPLD. The stream cipher produced is pretty secure as long as you keep changing the keys regularly as the original cipher implemented in the 802.11 standard which is based on rc4 was suseptable to attack through the birthday paradox when the keys were not chaged on a regular basis.Have fun

List of 30 messages in thread
TopicAuthorDate
Secure communication, Encryption            01/01/70 00:00      
   Forum search tools            01/01/70 00:00      
   Wait for it...            01/01/70 00:00      
      O.K I won't in that case steve            01/01/70 00:00      
   A good start would be FIPS 46            01/01/70 00:00      
      Secure?            01/01/70 00:00      
         proper key management helps a lot            01/01/70 00:00      
         IF pushed I would say.........            01/01/70 00:00      
            security            01/01/70 00:00      
            what is HUGE?            01/01/70 00:00      
               HUGE as in ...            01/01/70 00:00      
                  Rijmen and Daemen?            01/01/70 00:00      
                     Chipcon / TI CC2430 / 2510            01/01/70 00:00      
                        Hey good timing!            01/01/70 00:00      
                           your specification            01/01/70 00:00      
   blowfish or Twofish            01/01/70 00:00      
      AES128            01/01/70 00:00      
         That's why I told him to check bandwidth            01/01/70 00:00      
            rc4 is a a nice stream cypher            01/01/70 00:00      
   Chipcon / TI CC1010            01/01/70 00:00      
      yeah but its only single des            01/01/70 00:00      
         3DES            01/01/70 00:00      
   more secore = more horsepower            01/01/70 00:00      
      Simple schemes can be made more complex            01/01/70 00:00      
         Data size/speed            01/01/70 00:00      
   If anyone wants to play with it            01/01/70 00:00      
   anyway..now available            01/01/70 00:00      
   encryption example            01/01/70 00:00      
      arcfour on '51            01/01/70 00:00      
   DS2460 I2C Coprocessor            01/01/70 00:00      

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