Re: [Jsdsi-users] Specific Tag

[Guillermo N. <gna...@cc...>]

Hi,

apologies for not writing before I've been very busy these weeks. 

First of all thanks to all of you for your answers and suggestions. I
will try to explain a little bit more the tag I am using and the
meaning of the hash.

The main idea comes from micropayments as hashed chains. Were we may
have a hash chain like this: h^n(m),...,h^1(m),h^0(m)

What I do is to consider each element of the chain as an
authorization, thus a tag. I consider each element as: 
(id, index, val): (id,n,h^n(m)),...,(id,1,h^1(m)), (id,0,h^0(m)).

To intersect them, imagine I have (id, 2, h^2(m)) and (id, 3,
h^3(m)). The intersection should be (id,3,h^3(m)), because:

1- id's are iqual.
2- 3 is greater or equal to 2
3- and h^3(m)=h(h^2(m))

As you told me I can achieve points 1 and 2 using existing jsdsi tags,
but I think that for point three I need to redefine the intersection
function.  That is why I first though about extending
jsdsi.Tag. Another possibility is to avoid evaluating point 3 in the
intersection, but then the hash verification has to be done somewhere
else.

I am sorry I've my previous post were not very clear, and thanks again
for your interest. As I told you I've been quite busy, if I get
something out of this I will let you now.

Guillermo