### Using the Cloud to Determine Key Strengths -- Triennial Update

M. Delcourt, T. Kleinjung, A. K. Lenstra, S. Nath, D. Page, and N. Smart

##### Abstract

We develop a new methodology to assess cryptographic key strength using cloud computing, by calculating the true economic cost of (symmetric- or private-) key retrieval for the most common cryptographic primitives. Although the present paper gives the current year (2018), 2015, 2012 and 2011 costs, more importantly it provides the tools and infrastructure to derive new data points at any time in the future, while allowing for improvements such as of new algorithmic approaches. Over time the resulting data points will provide valuable insight in the selection of cryptographic key sizes. For instance, we observe that the past clear cost-advantage of total cost of ownership compared to cloud-computing seems to be evaporating.

Available format(s)
Category
Implementation
Publication info
Preprint. MAJOR revision.
Keywords
key lengthscloud computing
Contact author(s)
akl @ epfl ch
History
2019-01-11: revised
See all versions
Short URL
https://ia.cr/2018/1221

CC BY

BibTeX

@misc{cryptoeprint:2018/1221,
author = {M.  Delcourt and T.  Kleinjung and A. K.  Lenstra and S.  Nath and D.  Page and N.  Smart},
title = {Using the Cloud to Determine Key Strengths -- Triennial Update},
howpublished = {Cryptology ePrint Archive, Paper 2018/1221},
year = {2018},
note = {\url{https://eprint.iacr.org/2018/1221}},
url = {https://eprint.iacr.org/2018/1221}
}

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