Re: Trusted timestamping

2009-10-07 Thread Fearghas McKay
On 6 Oct 2009, at 14:48, Harald Hanche-Olsen wrote: As explained at http://www.itconsult.co.uk/stamper/stampnew.htm they moved to alt.security.pgp in 2002. But ... the latest timestamp summary I can see there is from May 2009, so I guess the point stands, unless it's just google groups that

Re: Trusted timestamping

2009-10-05 Thread Fearghas McKay
On 5 Oct 2009, at 16:04, Ian G wrote: My view is that there is no demand for this as a service. The apparent need for it is more a paper requirement that came out of PKI world's search for a perfect product than any business need. E.g., if you think you want it, you might be better

Re: 128 bit number T-shirt?

2007-05-02 Thread Fearghas McKay
At 20:59 -0400 1/5/07, Perry E. Metzger wrote: http://www.cafepress.com/09f9 There is also http://www.cafepress.com/09f911029d74e35 Which has a wider range of extra artwork. f - The Cryptography Mailing List

Re: Reusable hashcash for spam prevention

2004-05-25 Thread Fearghas McKay
This was posted on the ASRG list - the IRTF Anti Spam Research Group list, which at first reading indicates that the future for Hashcash/Camram may be limited. Eric Johansson the camram developer has some different numbers which he has just run that I will dig out and forward. f ---

Re: Reusable hashcash for spam prevention

2004-05-25 Thread Fearghas McKay
and the data that Eric S. Johansson got: -=-=- forwarded text -=-=- this is frustrating. I have run through the exact same calculations and come up with a very different answer. The answers I came up with the show that at worst case, spammers with zombies would almost have enough horsepower to