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The '''Toeplitz Hash Algorithm''' describes [[hash function]]s that compute hash values through [[matrix multiplication]] of the key with a suitable [[Toeplitz matrix]].<ref name="Krawczyk1995">{{cite journal|last1=Krawczyk|first1=Hugo|title=New Hash Functions for Message Authentication|volume=921|year=1995|pages=301–310|issn=0302-9743|doi=10.1007/3-540-49264-X_24|doi-access=free}}</ref> The Toeplitz Hash Algorithm is used in many [[Network interface controller|network interface controllers]] for receive side scaling.<ref name="kernel-org-scaling">{{cite web|url=https://www.kernel.org/doc/Documentation/networking/scaling.txt|title=Scaling in the Linux Networking Stack|accessdate=2014-05-22|archiveurl=https://web.archive.org/web/20140522233520/https://www.kernel.org/doc/Documentation/networking/scaling.txt|archivedate=22 May 2014|url-status=live}}</ref><ref name="microsoft-ndis-rss">{{cite web|url=http://download.microsoft.com/download/5/D/6/5D6EAF2B-7DDF-476B-93DC-7CF0072878E6/NDIS_RSS.doc|title=Scalable Networking: Eliminating the Receive Processing Bottleneck—Introducing RSS|accessdate=2014-05-22|archiveurl=https://web.archive.org/web/20140522235610/http://download.microsoft.com/download/5/D/6/5D6EAF2B-7DDF-476B-93DC-7CF0072878E6/NDIS_RSS.doc|archivedate=22 May 2014|url-status=live}}</ref>
As an example, with the Toeplitz matrix <math>T</math> the key <math>k</math> results in a hash <math>h</math> as follows:
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