Question about Milestone: ENUM Privacy and Security Considerations

Hi,

On the ENUM charter there is one milestone we have not (yet) completed:

Goals and Milestones:
   [...]
   Jul 2006 - ENUM Privacy and Security Considerations as an Informational

In the archieves I found a long expired I-D that intended to addresses 
that milestone:

   http://tools.ietf.org/html/draft-ietf-enum-privacy-security-01

Does anybody remember, why this work was discontinued?

[These discussions are dated back to the times before I started to attend 
the IETF ENUM WG meetings.]

cheers,
  Bernie, co-chair of the ENUM WG


PS: Such information might also be helpful for the current e2md 
discussions, where some folks consider privacy to be a concern.