Issues with LastModified

Hi,

I would like to reopen the discussion about LastModified field.

Firstly, in draft-ietf-sacred-protocol-bss-01.txt UploadRequest doesn't
contain LastModified anymore. I suspect it was removed by mistake from
the XML schema. Without LastModified in UploadRequest there are no
conditional uploads.

Secondly, it wouldn't be uncommon for a machine running a Sacred server
also to run a NTP client or similar.
Now imagine the following sequence of events:
1). Client A uploads a request and server assigns a LastModified value
to it.
2). NTP client running on the same machine adjust current time to be 5
minutes to the past from LastModified in 1).
3). Another upload request happens in these 5 minutes, assigned
LastModified will be less than in 1).

Thus I suggest you change LastModified to be a sequence counter,
incremented every time the credential is modified.

Regards,
Alexey Melnikov
__________________________________________
R & D, ACI Worldwide/MessagingDirect
Richmond, Surrey, UK
Phone: +44 20 8332 4508

I speak for myself only, not for my employer.
__________________________________________