Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A New Guess-and-Determine Attack on the A5/1 Stream Cipher   In Europe and North America, the most widely used stream cipher to ensure
privacy and confidentiality of conversations in GSM mobile phones is the A5/1.
In this paper, we present a new attack on the A5/1 stream cipher with an
average time complexity of 2^(48.5), which is much less than the brute-force
attack with a complexity of 2^(64). The attack has a 100% success rate and
requires about 5.65GB storage. We provide a detailed description of our new
attack along with its implementation and results.

37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
2
The categories of this paper are: math
10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
17
The categories of this paper are: q-fin
3
The categories of this paper are: physics
33
The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
25
The categories of this paper are: patt-sol
24
The categories of this paper are: dg-ga
29
The categories of this paper are: funct-an
27
The categories of this paper are: comp-gas