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RE: Security requirements for identification


Ok, let me see if I can give a taxonomy of possible
identifier properties:

1. Syntax
   Fixed length
	Partitioned
	    Fixed size partitions
	    Variable sized partitions
      Atomic
   Variable length

2. Global Semantics
	None
	Globally unique
		Database key
		No further semantics

3. Local Semantics
	None
	Locally unique
		No further semantics
		Expresses local geography
		Expresses local topology
		Expresses other local properties

3. Generation
   Random bit string
   Cryptographic hash
   Hierarchical assignment

Tony