> I'm no expert, so please verify anything that you don't trust here. > Block algorithms typically don't operate the way a cube operates. They > are named a block algorithm because they operate on a single block in, > single block out.
ok per block, it is still "a function (on a set) = output" >They have the same starting point and rules for each > block. Certainly there's more than one way to go about decoding a block > to reach the same answer. yes but then all those combos would be possible "keys" for that block. for example in the cube, if u turn one whole edge 4 times 90deg around an axis, you are back to where you start. so there will be multiple here too but: for example if i define a 90deg rotation as F(edge) I can always say I have rotated the edge by (k mod 4)F(edge) >If the method works for the all possible > blocks then you could say you have a key for the particular scenario. right... similarly all possible 4n+1,2,3 would give the same for all "n". > Logically though the only one that concerns you is the easiest method to > find. Currently no encryption algorithm is unbreakable. I am just wondering what makes them different.... >They are just > sufficiently difficult to break with relation to the data they protect. > It's absolutely possible to determine the session key for any algorithm > given sufficient plain and encrypted data and enough computing power. > The only variables are how much sample data and computing power you need. > hmm..thanks, will look into it. -Alok > > Andrew > > > Alok wrote: > > Maybe am a bit off my head.... > > > > but given a rubik cube, and a fixed axes of orientation defining it in > > space, > > > > are there more than one ways to get the cube into a particular formation? > > (not that I can solve the cube manually either...) > > Are block algorithms not closer to tensors? > > sorry if this sounds stupid though.. > > > > -thanks > > Alok > > ----- Original Message ----- > > From: "Bernhard Froehlich" <[EMAIL PROTECTED]> > > To: <openssl-users@openssl.org> > > Sent: Wednesday, January 19, 2005 6:10 AM > > Subject: Re: Even CA's make mistakes.. > > > > > > > >>Alok wrote: > >> > >> > >>>[...] > >>> > >>>lets take PKI out for a moment and talk simple block encryption, > >>> > >>>given that you know > >>>a. the message or the 1st few bits in it > >>>b. the set of possible block algorithms used to encrypt > >>> > >>>Can you determine session key? > >>> > >>> > >> > >>If it would be known to be possible this would not be a algorithm in > >>wide use. This kind of attack is well known as "known plaintext attack". > >> > >>Ted > >>;) > >> > >>-- > ______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List openssl-users@openssl.org Automated List Manager [EMAIL PROTECTED]
