The performance impact of BGP security
Zhao, M.; Smith, S.W.; Nicol, D.M.;
Network, IEEE
Volume 19,  Issue 6,  Nov.-Dec. 2005 Page(s):42 - 48 
Abstract:

The border gateway protocol possesses security vulnerabilities, because
speakers can lie. Proposed security protocols can address the
vulnerabilities, but can significantly increase the performance overheads,
which prevent their real-world deployment. Public key cryptography can
address these vulnerabilities. We report our research into analyzing
recently proposed security protocols and building simulation frameworks to
evaluate their costs, and designing and validating techniques to reduce
them.  
 

http://doi.ieeecomputersociety.org/10.1109/MNET.2005.1541720