Re: [Ideas] Diasambugating Identifier and Identity
Michael Menth <menth@uni-tuebingen.de> Fri, 14 April 2017 06:46 UTC
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From: Michael Menth <menth@uni-tuebingen.de>
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Date: Fri, 14 Apr 2017 08:45:56 +0200
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Subject: Re: [Ideas] Diasambugating Identifier and Identity
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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. 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. 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 -- Prof. Dr. habil. Michael Menth University of Tuebingen Faculty of Science Department of Computer Science Chair of Communication Networks Sand 13, 72076 Tuebingen, Germany phone: (+49)-7071/29-70505 fax: (+49)-7071/29-5220 mailto:menth@uni-tuebingen.de http://kn.inf.uni-tuebingen.de
- 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