Re: [Ideas] Diasambugating Identifier and Identity
Robert Moskowitz <rgm-ietf@htt-consult.com> Fri, 14 April 2017 12:40 UTC
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To: Michael Menth <menth@uni-tuebingen.de>, ideas@ietf.org
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From: Robert Moskowitz <rgm-ietf@htt-consult.com>
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Date: Fri, 14 Apr 2017 08:40:20 -0400
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Subject: Re: [Ideas] Diasambugating Identifier and Identity
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On 04/14/2017 02:45 AM, Michael Menth wrote: > Hi Robert, hi all, > > thanks for your thought-provoking mail. Reading the definitions gave me > the impression that identities can have very different properties > depending on their domains. I feel the text is stimulating but too long > for a definition. Good point. After 20+ years of working on Identity vs Identifier, it is hard for me to reduce the discussion down to a concise paragraph. I have seen too many domains of applicabilty to say, "this can't be so." Plus as the originator of self-proving ownership of an Identity with domain-specific statistically unique Identifiers, I have argued all sides of this subject. > What about: > > An identity (Idy) is a distinguishable entity within its domain. > > An identifier (Idf) is a label for an Idy. An Idy may have multiple > Idfs. > > Anything beyond this definition are valid observations that show the > diverse properties of domain-specific Idys. A discussion including > examples for entities and domains is helpful for illustration. This also > pertains to the relation between objects and Idys. And then have a section that goes a little in depth on Identity and Identifier. A can work with that. > > Regards, > > Michael > > Am 14.04.2017 um 01:58 schrieb Robert Moskowitz: >> I am finally getting back to this subject. >> >> >> On 03/28/2017 12:07 PM, Robert Moskowitz wrote: >>> The Identifier/Identity definitions in >>> draft-padma-ideas-problem-statement-01.txt is a good start, it fails >>> in the appreviations used. (There is NO abbreviation for Identity!) >>> >>> ID should NOT be the appreviation of Identitfier. People will default >>> to thinking 'Identity' when they see it. Think about people outside >>> our discussion group. >>> >>> I propose 'IDf' for Identifier. 'ID' is too owned by Identity. >>> >>> I will be working on proposed wording to improve these definitions. >> I have worked up definitions, sent it out to a few reviewers, got some >> comments and questions. First my current draft, then a few questions: >> >> Replacement text for: draft-padma-ideas-problem-statement >> >> Identity (Abbr: IDT or IDt): A collection of information that is >> unique to an object and differentiates it from all other objects. >> >> An identity consists of information that is stated about the object by >> itself or a governing authority. It consists of a set of attributes >> and/or actions the object can take. An Identity may be assigned a >> lifetime (e.g., a time period), which is determined by either the object >> or the governing authority responsible for defining the identity of the >> object, or a designated third party. An object can have multiple >> Identities and can create and discard Identities at will. An Identity >> may be ‘indestructible’. That is, it is so unique and non replicatible >> that no other object could ever duplicate it, nor can the object discard >> it within its lifetime without being a ‘clone’ object. Identity is used >> in authentication registration and policy ownership proofs. >> >> >> Identifier (Abbr: IDF or IDf): A label that is unique for an object a >> particular scope. >> >> The label follows strict construction rules for the objects and the >> context that the label is applied to. For a particular context, an >> Identifier is used to reference an Identity for the object. In most >> cases, an Identifier is bound to an Identity through some trusted >> mechanism. An Identity can have different Identifiers, potentially >> following different construction rules, for different contexts and/or >> domains of applicability. >> >> >> ========== >> >> Now onto a few questions: >> >> Per: "An object can have multiple Identities" clause, I am challenged with >> >> "This is VERY dangerous. In most software systems, it is the >> responsibility of the management system to assign a single identity to >> an object when it is created. If an object has multiple identities, it >> could suffer from 'multiple personality syndrome'. >> >> More importantly, if the object is allowed to create and discard >> identities at will, how do other objects know that the object is who it >> attests to be?" >> >> I think it is very important for some situations for support of multiple >> Identities. No all. There are domains as indicated above where it >> causes big problems. >> >> Per: "An Identity may be ‘indestructible’." clause, I am challenged with >> >> "This doesn’t make any sense. Why would anyone care if the identity is >> indestructible or not?" >> >> I can think of examples of such Identities, or claim of such Identities, >> like DNA. >> >> And finally, Per: "Identity is used in authentication registration and >> policy ownership proofs." clause, I am challenged with >> >> "What does this mean?" >> >> I will have to work on this some more, or perhaps it does not belong in >> the definition section. >> >> Comments please >> >> _______________________________________________ >> Ideas mailing list >> Ideas@ietf.org >> https://www.ietf.org/mailman/listinfo/ideas
- Re: [Ideas] Diasambugating Identifier and Identity Toerless Eckert
- Re: [Ideas] Diasambugating Identifier and Identity Hesham ElBakoury
- Re: [Ideas] Diasambugating Identifier and Identity Michael Menth
- Re: [Ideas] Diasambugating Identifier and Identity Padma Pillay-Esnault
- Re: [Ideas] Diasambugating Identifier and Identity Robert Moskowitz
- Re: [Ideas] Diasambugating Identifier and Identity Michael Menth
- Re: [Ideas] Diasambugating Identifier and Identity Robert Moskowitz
- Re: [Ideas] Diasambugating Identifier and Identity Robert Moskowitz
- Re: [Ideas] Diasambugating Identifier and Identity Alexander Clemm
- Re: [Ideas] Diasambugating Identifier and Identity Michael Menth
- Re: [Ideas] Diasambugating Identifier and Identity Liubingyang (Bryan)
- Re: [Ideas] Diasambugating Identifier and Identity Michael Menth
- Re: [Ideas] Diasambugating Identifier and Identity Dino Farinacci
- Re: [Ideas] Diasambugating Identifier and Identity Alexander Clemm
- Re: [Ideas] Diasambugating Identifier and Identity Michael Menth
- Re: [Ideas] Diasambugating Identifier and Identity Alexander Clemm
- Re: [Ideas] Diasambugating Identifier and Identity Liubingyang (Bryan)
- Re: [Ideas] Diasambugating Identifier and Identity Michael Menth
- Re: [Ideas] Diasambugating Identifier and Identity Michael Menth
- Re: [Ideas] Diasambugating Identifier and Identity Alexander Clemm
- Re: [Ideas] Diasambugating Identifier and Identity Michael Menth
- Re: [Ideas] Diasambugating Identifier and Identity Liubingyang (Bryan)
- [Ideas] Diasambugating Identifier and Identity Robert Moskowitz
- Re: [Ideas] Diasambugating Identifier and Identity Padma Pillay-Esnault
- Re: [Ideas] Diasambugating Identifier and Identity Hesham ElBakoury
- Re: [Ideas] Diasambugating Identifier and Identity Alexander Clemm
- Re: [Ideas] Diasambugating Identifier and Identity Hesham ElBakoury
- Re: [Ideas] Diasambugating Identifier and Identity Axel.Nennker
- Re: [Ideas] Diasambugating Identifier and Identity Robert Moskowitz
- Re: [Ideas] Diasambugating Identifier and Identity Dino Farinacci
- Re: [Ideas] Diasambugating Identifier and Identity Robert Moskowitz
- Re: [Ideas] Diasambugating Identifier and Identity Dino Farinacci