Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: BSEA-1 - A Stream Cipher Backdooring Technique   Recent years have shown that more than ever governments and intelligence
agencies try to control and bypass the cryptographic means used for the
protection of data. Backdooring encryption algorithms is considered as the best
way to enforce cryptographic control. Implementation backdoors (at the
protocol/implementation/ma\-nagement level) are generally considered. In this
paper we propose to address the most critical issue of backdoors: mathematical
backdoors or by-design backdoors, which are put directly at the mathematical
design of the encryption algorithm. Considering a particular family (among all
the possible ones) of backdoors, we present BSEA-1, a stream cipher algorithm
which contains a design backdoor enabling an effective cryptanalysis. The
BSEA-1 algorithm uses a 120-bit key. The exploitation of the backdoor enables
to break the cipher with around 2 Kbits of knowplaintext in a few seconds.

36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math
27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
8
The categories of this paper are: hep-ex
26
The categories of this paper are: bayes-an
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
4
The categories of this paper are: cond-mat
10
The categories of this paper are: q-bio
14
The categories of this paper are: math-ph