Re: Set date for signature to expire

2005-06-14 Thread David Shaw
On Tue, Jun 14, 2005 at 02:58:32PM +0200, Jan Niehusmann wrote: > On Wed, Jun 08, 2005 at 02:09:59AM +0200, Per Tunedal Casual wrote: > > True, but it might be convenient anyhow. The shorter the time, the safer > > the guess! > > > > One way is to assume that the key is attacked immediately and th

Re: Set date for signature to expire

2005-06-14 Thread Jan Niehusmann
On Wed, Jun 08, 2005 at 02:09:59AM +0200, Per Tunedal Casual wrote: > True, but it might be convenient anyhow. The shorter the time, the safer > the guess! > > One way is to assume that the key is attacked immediately and that all the > security is in the passphrase. Make an estimation of the stre

Re: Set date for signature to expire

2005-06-08 Thread Werner Koch
On Wed, 08 Jun 2005 02:09:59 +0200, Per Tunedal Casual said: > Issuers of X509 certificates use 1 year for soft certificates and 5 years > for card certificates. I don't know their calculations behind that decision. That is a different thing: It is the expiration time of the key; something one sh

Re: Set date for signature to expire

2005-06-07 Thread Per Tunedal Casual
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 At 15:40 2005-06-07, you wrote: >On Mon, 6 Jun 2005 12:20:33 -0400, Anonymous said: > >> #2. A statement that you trust that the UID accurately reflects the >> true ownership of the key. > >I just wonder how to decide how long this ownership is valid

Re: Set date for signature to expire

2005-06-07 Thread Werner Koch
On Mon, 6 Jun 2005 12:20:33 -0400, Anonymous said: > #2. A statement that you trust that the UID accurately reflects the > true ownership of the key. I just wonder how to decide how long this ownership is valid. A year, a month, a day, a minute or even already void in the past? The owner usual

Re: Set date for signature to expire

2005-06-06 Thread Anonymous
"> Your are mixing up two things: The statement that you checked the owneership of the key at a certain date and how far you trust the owner of the key to implement decent keymanagment abilities. I know that the OpenPGP group has taken great pains to not define trust. It leaves trust to be defi

Re: Set date for signature to expire

2005-06-06 Thread Werner Koch
On Sun, 5 Jun 2005 21:46:12 -0400, Anonymous said: > Well if I know that the person is lazy, and keeps the key on an > unsecure computer and it is likely that within one year the key will > be compromized, I would sign with a one year expiration date. Basicly Your are mixing up two things: The s

Re: Set date for signature to expire

2005-06-06 Thread Werner Koch
On Sun, 5 Jun 2005 10:21:51 +0300 (EEST), Oskar L said: > May I ask why you, or anyone, would want to do this? If I get a public key > with a signature from someone who's key I have verified and who I trust to > check keys properly, then why should it matter to me if that signature has The signat

Re: Set date for signature to expire

2005-06-05 Thread Anonymous
May I ask why you, or anyone, would want to do this? If I get a public key with a signature from someone who's key I have verified and who I trust to check keys properly, then why should it matter to me if that signature has expired or not? It still means the same thing; that the person who signed

Re: Set date for signature to expire

2005-06-05 Thread Oskar L.
"Per Tunedal Casual" <[EMAIL PROTECTED]> wrote: > Hi, > I want to sign keys with signatures having a limited life time. Can I set > an expiration date when I sign a key? > > I often get a question if I want my signature to expire when the key > expires, so far so good. I want to set a date of my o

Re: Set date for signature to expire

2005-06-03 Thread David Shaw
On Sat, Jun 04, 2005 at 04:28:56AM +0200, Per Tunedal Casual wrote: > Hi, > I want to sign keys with signatures having a limited life time. Can I set > an expiration date when I sign a key? > > I often get a question if I want my signature to expire when the key > expires, so far so good. I want t

Set date for signature to expire

2005-06-03 Thread Per Tunedal Casual
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hi, I want to sign keys with signatures having a limited life time. Can I set an expiration date when I sign a key? I often get a question if I want my signature to expire when the key expires, so far so good. I want to set a date of my own will. Pe