Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Tiered Security System for Mobile Devices   We have designed a tiered security system for mobile devices where each
security tier holds user-defined security triggers and actions. It has a
friendly interface that allows users to easily define and configure the
different circumstances and actions they need according to context. The system
can be set up and activated from any browser or directly on the mobile device
itself. When the security system is operated from a Web site or server, its
configuration can be readily shared across multiple devices. When operated
directly from the mobile device, no server is needed for activation. Many
different types of security circumstances and actions can be set up and
employed from its tiers. Security circumstances can range from temporary
misplacement of a mobile device at home to malicious theft in a hostile region.
Security actions can range from ringing a simple alarm to automatically
erasing, overwriting, and re-erasing drives.

10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
11
The categories of this paper are: hep-lat
13
The categories of this paper are: quant-ph
7
The categories of this paper are: hep-th
30
The categories of this paper are: q-alg
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
24
The categories of this paper are: dg-ga
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
29
The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph
23
The categories of this paper are: solv-int