Oded Goldreich, Boaz Barak, Jonathan Katz, Hugo Krawczyk, and Avi Wigderson wrote letters responding to Koblitz's article, which were published in the November 2007 and January 2008 issues of the journal. Katz, who is coauthor of a highly regarded cryptography textbook, called Koblitz's article "snobbery at its purest"; and Wigderson, who is a permanent member of the Institute for Advanced Study in Princeton, accused Koblitz of "slander." Ivan Damgård later wrote a position paper at ICALP 2007 on the technical issues, and it was recommended by Scott Aaronson as a good in-depth analysis. Brian Snow, former Technical Director of the Information Assurance Directorate of the U.S. National Security Agency, recommended the Koblitz-Menezes paper "The brave new world of bodacious assumptions in cryptography" to the audience at the RSA Conference 2010 Cryptographers Panel. Practice oriented provable security Classical provable security primarily aimed at studying the relationship between asymptotically defined objects. Instead, practice-oriented provable security is concerned with concrete objects of cryptographic practice, such as hash functions, block ciphers, and protocols as they are deployed and used. Practice oriented provable security uses concrete security to analyse practical constructions with fixed key sizes. "Exact security" or "concrete security" is the name given to provable security reductions where one quantifies security by computing precise bounds on computational effort, rather than an asymptotic bound which is guaranteed to hold for "sufficiently large" values of the security parameter. References Theory of cryptography