[cryptography] NSA IDA Cryptological Research Centers
John Young
jya at pipeline.com
Sun Sep 29 09:43:54 EDT 2013
The Institute for Defense Analyses, based in Alexandria, VA,
is a 50-year partner of NSA. It has two Centers for Communications
Research at Princeton, NJ, and La Jolla, CA, both doing cryptological
research for NSA:
http://www.idaccr.org/
http://www.ccrwest.org/
The latter's web site lists only this offering:
[Quote]
La Jolla Covering Repository
A (v,k,t)-covering design is a collection of k-element subsets,
called blocks, of {1,2,...,v}, such that any t-element subset is
contained in at least one block. This site contains a collection of
good (v,k,t)-coverings. Each of these coverings gives an upper bound
for the corresponding C(v,k,t), the smallest possible number of
blocks in such a covering design.
The limit for coverings is v<100, k<=25, and t<=8 just to draw the
line somewhere. Only coverings with at most 100000 blocks are given,
except for some which were grandfathered in. Some Steiner systems
(coverings in which every t-set is covered exactly once) which are
too big for the database will be included in the link below.
[Unquote]
What is "covering" and how does it related to cryptology?
-----
Eyeballs of the two centers:
http://cryptome.org/2013-info/09/nsa-ccr/nsa-ccr.htm
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