Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cryptanalysis of a Classical chaos-based cryptosystem with some quantum
  cryptography features   The application of synchronization theory to build up new cryptosystems has
been a hot topic during the last two decades. In this paper we analyze a recent
proposal in this field. We pinpoint the main limitations of the software
implementation of chaos-based systems designed on the grounds of
synchronization theory. In addition, we show that the cryptosystem under
evaluation possesses serious security problems that imply a clear reduction of
the key space.

4
The categories of this paper are: cond-mat
19
The categories of this paper are: eess
11
The categories of this paper are: hep-lat
10
The categories of this paper are: q-bio
3
The categories of this paper are: physics
5
The categories of this paper are: gr-qc
14
The categories of this paper are: math-ph
24
The categories of this paper are: dg-ga
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg