David Hook is an active developer and co-founder of the Bouncy Castle cryptography project, now in its 23rd year, and has been working with the Java Cryptography APIs since their original publication in the late 1990s. In addition to his development work with Bouncy Castle, David has also given presentations and tutorials on the Java Cryptography framework and on the use of the Bouncy Castle APIs, as well as writing several articles, a previous book "Beginning Cryptography with Java" and the mini-ebook "BC FIPS in 100 Examples". He currently works at Keyfactor supporting the use and development of the Bouncy Castle APIs and has recently lead the "charge" which resulted in a version of the APIs being certified for FIPS 140-2. He is a member of the Association of Computing Machinery and the IEEE.