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Re: Linkology -- short version
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At 08:45 AM 4/21/97 EDT, Ron Rivest wrote:
>
>Here is the real impact of what I am proposing for SPKI/SDSI. The
>rest of my long note was discussion that can be read later.
>
>Point: A link should be clearly identified as such, and not muddled in with
> another primitive, such as "hash". A hash is only one way of having
> a secure link to another object.
>
>Thus: Use (link (hash sha #ab..#))
> instead of (hash sha #ab..#)
>
> Use (link (hash sha #ab..#) (url "http://..."))
> instead of (hash sha #ab..# "http://...")
>
>This is CLEARER as to INTENT, and is EXTENSIBLE for other kinds of links
>in the future, some of which may not involve hashing. (SDSI names is the
>primary candidate I have in mind, but there will be others.) The cost of
>making this change is also minimal.
Ron,
what the (link ...) format makes explicit are the only meanings I had
attached to the formats it replaces. If you want to convince me to add the
extra layer of object nesting, I would like to see eventual alternatives
which (link ...) supports and the current mechanism doesn't and/or different
interpretations for the current forms.
That is, I have been using (hash ...) as a link only and the optional
URL at the end of the hash as just a hint. Do you envision different
(non-link) interpretations for the form (hash ...)?
- Carl
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|Carl M. Ellison cme@cybercash.com http://www.clark.net/pub/cme |
|CyberCash, Inc. http://www.cybercash.com/ |
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