Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: ArchiveSafe: Mass-Leakage-Resistant Storage from Proof-of-Work   Data breaches-mass leakage of stored information-are a major security
concern. Encryption can provide confidentiality, but encryption depends on a
key which, if compromised, allows the attacker to decrypt everything,
effectively instantly. Security of encrypted data thus becomes a question of
protecting the encryption keys. In this paper, we propose using keyless
encryption to construct a mass leakage resistant archiving system, where
decryption of a file is only possible after the requester, whether an
authorized user or an adversary, completes a proof of work in the form of
solving a cryptographic puzzle. This proposal is geared towards protection of
infrequently-accessed archival data, where any one file may not require too
much work to decrypt, decryption of a large number of files-mass
leakage-becomes increasingly expensive for an attacker. We present a prototype
implementation realized as a user-space file system driver for Linux. We report
experimental results of system behaviour under different file sizes and puzzle
difficulty levels. Our keyless encryption technique can be added as a layer on
top of traditional encryption: together they provide strong security against
adversaries without the key and resistance against mass decryption by an
attacker.

30
The categories of this paper are: q-alg
3
The categories of this paper are: physics
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an
29
The categories of this paper are: funct-an
25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
6
The categories of this paper are: astro-ph
21
The categories of this paper are: adap-org