IEEE Technology and Society Magazine - June 2018 - 59

Invisible
Mannequin
> Disquise <
Lockout
[Cancel]

Select

(a)

Disquise - Choose Form:

(b)

?
Roger

Bob

Random

(c)

Figure 3. (a)-(c) A user selects one of multiple available privacy plans from a privacy options menu.

described in previous sections (or variants thereof).
Though we lack the space to illustrate it, we believe that
each of these fundamentals admits to a relatively simple algorithmic plan whose implementation would be
useful to privacy-seeking avatars. Figure 3(a) shows the
user's view of a local area of a virtual world. The privacy
options menu is available through the user interface - in
this example a sunglasses "button" appears in the
upper right hand corner of the user's view. If the user
selects this button, the menu of available privacy plans
is displayed, as shown in Figure 3(b). The user then
selects a plan, for example the 'Disguise' plan. In res ponse, the system allows the user to choose the form of
the disguise, as illustrated in Figure 3(c). Once the user
has configured the disguise, then the user's avatar
takes on the new disguised appearance, and in subsequent virtual world interactions the user's privacy will
be preserved.
Once multiple privacy preserving tools are organized
into a framework, it becomes possible to enable richer
interaction with the available tools. For example, the
framework may allow the user to select and execute
multiple privacy plans together in useful ways. Here are
some examples where a combination of privacy plans
may provide increasing benefits over a single plan:
1) A user chooses to combine Disguise or Invisibility
with Teleport such that the user's avatar vanishes
from its original location and appears at a second
location chosen by the user, but at the second location the avatar appears disguised or invisible (as previously chosen by the user). In this way, any avatars
or bots observing the user at the original location will
lose track of the user when teleport is engaged, and
any users or bots at the second location will not "see"
the user's true appearance and thus will not be able
to identify the user's avatar at the second location.
2) A user chooses to combine the Clones plan with
Invisibility such that when the additional cloned
copies of the user's avatar appear, the user's true avatar
simultaneously becomes invisible. Any avatars or
JUNE 2018

∕

bots observing the user before this combination of
plans is executed will not only be confused by the
appearance of multiple clones of the user, but will be
guaranteed to lose track of the user's true avatar due
to the invisibility effect.
3) A user chooses to combine Private Copy with Teleport so that the private copy of a part of the virtual
world selected by the user is created, and the user is
then teleported into that private copy. The portion of
the virtual world selected for Private Copy may be
quite distant from the user's starting location in the
virtual world, for example the user may select this
portion using a map-like interface, or perhaps select
it from a list of identifiable locations from a menu. In
this way, surveilling avatars or bots will merely see
the user disappear for a time, and they will not see
the user entering or approaching the location on
which the private copy will be based.
Figure 4 illustrates a user interface for selection of
multiple privacy plans in combination. In this example,
the user begins in a park area of the virtual world, as
shown in Figure 4(a). The user feels like gambling at a
casino across town, but does not want to be seen at the
casino. The user selects the privacy options menu as in
the previous example, however now the menu allows
the user to make multiple selections. In this case, the
user selects both Teleport and Private Copy. Once the
selection is made, the system allows the user to configure the selected privacy plans. As illustrated in Figure  4(b) the system may display a map interface and
may ask the user to select the part of the virtual world
on which the private copy is based. The user selects the
casino from the map interface. With configuration complete, the system spawns a private copy of the casino
and teleports the user into the private copy. The user's
new view is illustrated in Figure 4(c). Note that some
visual indication is given in the user's view to remind
the user that he is no longer interacting with the full virtual world, but rather is within a private copy of the casino. The user enjoys gambling at the casino for a time,

IEEE Technology and Society Magazine

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Table of Contents for the Digital Edition of IEEE Technology and Society Magazine - June 2018

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