Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Long Passphrases: Potentials and Limits   Passphrases offer an alternative to traditional passwords which aim to be
stronger and more memorable. However, users tend to choose short passphrases
with predictable patterns that may reduce the security they offer. To explore
the potential of long passphrases, we formulate a set of passphrase policies
and guidelines aimed at supporting their creation and use. Through a 39-day
user study we analyze the usability and security of passphrases generated using
our policies and guidelines. Our analysis indicates these policies lead to
reasonable usability and promising security for some use cases, and that there
are some common pitfalls in free-form passphrase creation. Our results suggest
that our policies can support the use of long passphrases.

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The categories of this paper are: atom-ph
5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
29
The categories of this paper are: funct-an
15
The categories of this paper are: nucl-ex
8
The categories of this paper are: hep-ex
4
The categories of this paper are: cond-mat
20
The categories of this paper are: acc-phys
25
The categories of this paper are: patt-sol
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The categories of this paper are: mtrl-th
19
The categories of this paper are: eess
6
The categories of this paper are: astro-ph
27
The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph