Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Public Key Exchange Using Matrices Over Group Rings   We offer a public key exchange protocol in the spirit of Diffie-Hellman, but
we use (small) matrices over a group ring of a (small) symmetric group as the
platform. This "nested structure" of the platform makes computation very
efficient for legitimate parties. We discuss security of this scheme by
addressing the Decision Diffie-Hellman (DDH) and Computational Diffie-Hellman
(CDH) problems for our platform.

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The categories of this paper are: q-bio
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The categories of this paper are: q-fin
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The categories of this paper are: q-alg
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The categories of this paper are: cmp-lg
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The categories of this paper are: math-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: funct-an
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The categories of this paper are: physics
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The categories of this paper are: econ
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The categories of this paper are: hep-lat
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The categories of this paper are: eess
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The categories of this paper are: acc-phys
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The categories of this paper are: patt-sol
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The categories of this paper are: chem-ph
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The categories of this paper are: hep-th
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The categories of this paper are: cond-mat