----- "Graeme Geldenhuys" <graemeg.li...@gmail.com> schreef:
> On 9 December 2011 10:42, Felipe Monteiro de Carvalho wrote: > > > > It is specifically written in the Delphi documentation that Random > > should not be utilized for encryption... > > Delphi documentation mentions a lot of things you mustn't do... Does > that stop anybody. ;-) only those that take their jobs seriously and read help/manuals iso assuming? :-) > Like I said, I didn't write that code, and I don't specialise in > encryption algorithms. But Florian might be right, the RandSeed > assignment might have been added due to the bad random generator of > Delphi - hopefully the original author of the code can shed some > light. > I actually doubt that that codesnippet does any real encryption. From what I understand from it (with the provided code and assuming types), the source-message is bitstreamed. In the resulting message, the LSB of every octet/byte/8-bitvalue is the one you need to focus on, the rest is random data. Also, as a result, the result-message is 8 times as large. And that LSB is also easily decrypted => parse the LSB from every byte in your data and reconstruct using OR the (index mod 8)-th bit on the (index div 8) octet. hardly encrypted ;-) kind regards, Dimitri Smits _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
