Re: [cryptography] Proving knowledge of a message with a given SHA-1 without disclosing it?

2012-02-23 Thread Samuel Neves
On 02/01/2012 10:32 PM, Jonathan Katz wrote: On Wed, 1 Feb 2012, Nico Williams wrote: On Wed, Feb 1, 2012 at 3:49 AM, Francois Grieu fgr...@gmail.com wrote: The talk does not give much details, and I failed to locate any article with a similar claim. I would find that result truly

Re: [cryptography] Bitcoin in endgame

2012-02-23 Thread Jonathan Thornburg
On Thu, 23 Feb 2012, James A. Donald wrote: [[for attacking bitcoin]] botnets cannot compete with legit miners, because to get a reasonable return, you need to mine with a graphics card, and while mining with graphics card, your graphics goes to hell, which will cause the most slow witted owner

Re: [cryptography] Bitcoin in endgame

2012-02-23 Thread Moritz Bartl
On 23.02.2012 10:24, Eugen Leitl wrote: In general so far I fail to see the validity of most criticisms against BitCoin. So far I see the only real problem is government crackdown on exchanges, which only makes BTC free-floating and slows down the growth of the underlying economy. Sorry if

Re: [cryptography] Bitcoin in endgame

2012-02-23 Thread coderman
On Thu, Feb 23, 2012 at 1:24 AM, Eugen Leitl eu...@leitl.org wrote: On Thu, Feb 23, 2012 at 01:00:20AM -0800, Jonathan Thornburg wrote: On Thu, 23 Feb 2012, James A. Donald wrote: [[for attacking bitcoin]] botnets cannot compete with legit miners, because to get a reasonable return, you

Re: [cryptography] Duplicate primes in lots of RSA moduli

2012-02-23 Thread ianG
Well, that was a long post, Marsh! I think it is a good perspective. And it occurs to me that if this is a real problem there might be a real solution. I suggest going to NIST and asking them to run a design competition for a hardware cell that produces good entropy. Hardware designs aka

Re: [cryptography] Duplicate primes in lots of RSA moduli

2012-02-23 Thread Ondrej Mikle
On 02/22/2012 10:55 PM, Marsh Ray wrote: I'm putting myself in the position of an engineer who's designing the logic and writing some low-level firmware for the next consumer grade $50 blue box home router/wifi/firewall appliance: === [cue dream sequence wavy blur effect] I'm an EE

Re: [cryptography] Duplicate primes in lots of RSA moduli

2012-02-23 Thread Marsh Ray
On 02/23/2012 02:27 PM, Ondrej Mikle wrote: On 02/22/2012 10:55 PM, Marsh Ray wrote: I'm putting myself in the position of an engineer who's designing the logic and writing some low-level firmware for the next consumer grade $50 blue box home router/wifi/firewall appliance: === [cue dream

Re: [cryptography] To Virtualise or Not?

2012-02-23 Thread ianG
Hi James, On 23/02/12 11:16 AM, James A. Donald wrote: On 2012-02-23 9:07 AM, ianG wrote: Um. I feel exactly the reverse. I feel uncomfortable with crypto code written in languages that guarantee buffer overflows, stack busting attacks, loose semantics at data and calling levels, a 5 x

Re: [cryptography] Bitcoin in endgame

2012-02-23 Thread coderman
On Thu, Feb 23, 2012 at 3:13 AM, Eugen Leitl eu...@leitl.org forwarded: ... 10% of what? 13 THashes or 8 THashes?  Pool owners don't like 100,000 client to connect that have only little mining power. they run the botminers through intermediate proxies. these stick out given the number of work

Re: [cryptography] Duplicate primes in lots of RSA moduli

2012-02-23 Thread Ondrej Mikle
On 02/24/2012 12:00 AM, Michael Nelson wrote: Ondrej Mikle wrote: I took some first 80 results from crunching the moduli and mapped them back to certificates. In EFF's SSL Observatory there were 3912 unique certs sharing those factorized moduli (all embedded devices), couple extra in