Re: [OpenID] rfc2817: https vs http

2008-09-01 Thread Eric Rescorla
At Mon, 1 Sep 2008 21:56:52 +0100, Ben Laurie wrote: > > On Mon, Sep 1, 2008 at 9:49 PM, Eric Rescorla <[EMAIL PROTECTED]> wrote: > > At Mon, 1 Sep 2008 21:00:55 +0100, > > Ben Laurie wrote: > >> The core issue is that HTTPS is used to establish end-to-end security, > >> meaning, in particular, au

Re: [OpenID] rfc2817: https vs http

2008-09-01 Thread Ben Laurie
On Mon, Sep 1, 2008 at 9:49 PM, Eric Rescorla <[EMAIL PROTECTED]> wrote: > At Mon, 1 Sep 2008 21:00:55 +0100, > Ben Laurie wrote: >> The core issue is that HTTPS is used to establish end-to-end security, >> meaning, in particular, authentication and secrecy. If the MitM can >> disable the upgrade t

Re: [OpenID] rfc2817: https vs http

2008-09-01 Thread Eric Rescorla
At Mon, 1 Sep 2008 21:00:55 +0100, Ben Laurie wrote: > The core issue is that HTTPS is used to establish end-to-end security, > meaning, in particular, authentication and secrecy. If the MitM can > disable the upgrade to HTTPS then he defeats this aim. The fact that > the server declines to serve a

512-bit discrete logarithms, in practice

2008-09-01 Thread Jack Lloyd
How difficult is it to compute discrete logarithms modulo a 512-bit prime p of the form 2*q+1, q prime? I have had no luck finding recent DL results, as it seems factoring is the preferred benchmark/target. The DL algorithms seem to be have roughly the same runtimes as factoring, but this is only

Re: [OpenID] rfc2817: https vs http

2008-09-01 Thread Ben Laurie
[Adding the cryptography list, since this seems of interest] On Wed, Aug 27, 2008 at 8:58 PM, Story Henry <[EMAIL PROTECTED]> wrote: > Apparently rfc2817 allows an http url tp be used for https security. > > Given that Apache seems to have that implemented [1] and that the > openid url is mostly u

ACH fraud

2008-09-01 Thread Perry E. Metzger
Several people have sent in a link to a New York Times story on ACH fraud: http://www.nytimes.com/2008/08/30/business/yourmoney/30theft.html Perry -- Perry E. Metzger[EMAIL PROTECTED] - The Cryptography Mailing