Re: Digital signing of printed documents

2005-07-05 Thread Alphonse Ogulla
On 7/4/05, Dave Howorth <[EMAIL PROTECTED]> wrote: > Alphonse Ogulla wrote: > > Hi good people, > > I wish to get your views on how I can implement a system that will > > capture text of a financial document that is to be printed, run a hash > > algorithm (SHA-1) over the document text, store an el

Re: Digital signing of printed documents

2005-07-05 Thread Alphonse Ogulla
On 7/4/05, Lee Braiden <[EMAIL PROTECTED]> wrote: > I'd be worried about why you need to validate an invoice or receipt in the > first place. Local regulations stipulate so. I really don't know why but ill make an effort to find out why this is the case. -- Rgds, Alphonse, Nairobi-Kenya

Re: Digital signing of printed documents

2005-07-04 Thread Dave Howorth
Alphonse Ogulla wrote: Hi good people, I wish to get your views on how I can implement a system that will capture text of a financial document that is to be printed, run a hash algorithm (SHA-1) over the document text, store an electronic copy of the document and its digital signature to disk and

Re: Digital signing of printed documents

2005-07-04 Thread Lee Braiden
On Monday 04 Jul 2005 13:42, Alphonse Ogulla wrote: > The objective is to set up a robust electronic document validation > system that can authenticate electronically produced documents using > Debian GNU/Linux and other open-source tools. My search for an > existing open-source solution did not yi

Re: Digital signing of printed documents

2005-07-04 Thread Lee Braiden
On Monday 04 Jul 2005 14:10, Shaun Lipscombe wrote: > On the gpg mailing list they basically came to the conclusion that SHA-1 > is *weaker* than previously thought based on the fact that collisions > can be found in SHA-1 in 2**69 hash operations, much less than the > brute-force attack of 2**80 o

Re: Digital signing of printed documents

2005-07-04 Thread John Hasler
Alphonse Ogulla writes: > I wish to get your views on how I can implement a system that will > capture text of a financial document that is to be printed, run a hash > algorithm (SHA-1) over the document text... I suggest that you use SHA-2. SHA-1 may no longer be secure. -- John Hasler -- To

Digital signing of printed documents

2005-07-04 Thread Alphonse Ogulla
Hi good people, I wish to get your views on how I can implement a system that will capture text of a financial document that is to be printed, run a hash algorithm (SHA-1) over the document text, store an electronic copy of the document and its digital signature to disk and lastly print the documen