Re: Breaking RSA: Totient indirect factorization

2007-11-15 Thread Alexander Klimov
On Wed, 14 Nov 2007, gandlf wrote: > 1) m = p*q-> RSA modulus > > [...] > > Algorithm > - > > - Repeat "a = a^n mod m" with n from 2 to m, saving all the results > in a table until a == 1 (Statement 4). :-) So what is the expected running time of your algorithm? For example,

Re: On-going Internet Emergency and Domain Names

2007-04-12 Thread Alexander Klimov
On Mon, 2 Apr 2007, Bob Fiero wrote: > RBLs such as SpamCop gave me an idea a few years back. We should > build a virtual wall around the country. In theory it is a good idea, but in practice it is not clear if the rate of false positives or false negatives will not ruin the system. Even if you pr

Re: Defeating CAPTCHAs via Averaging

2007-01-30 Thread Alexander Klimov
On Sat, 27 Jan 2007 [EMAIL PROTECTED] wrote: > The detailed article (including sample images) is online here: > http://www.cip.physik.uni-muenchen.de/~wwieser/misc/captcha/ > >> To extract a series of captchas with the same information (number) >> in them, it is sufficient to repeatedly call their

Re: A Nasty Security Bug that affect PGP Virtual Disks & PGP SDA , PGP 8.x & 9.x and Truecrypt.

2006-05-26 Thread Alexander Klimov
On Wed, 24 May 2006 [EMAIL PROTECTED] wrote: > Steps to access PGP Encrypted Disk (Passphrase) using a Backdoor type attack > [...] > * Now say you give that disk to someone and they changed the > passphrase on it. You can still access it Intuitively, the system works as follows: a rando

Re: gcc 4.1 bug miscompiles pointer range checks, may place you at risk

2006-04-18 Thread Alexander Klimov
On Mon, 17 Apr 2006, Felix von Leitner wrote: > static inline int range_ptrinbuf(const void* buf,unsigned long len,const > void* ptr) { > register const char* c=(const char*)buf; /* no pointer arithmetic on > void* */ > return (c && c+len>c && (const char*)ptr-c } > > [...] > > assert(