Feisty Duck
SSL/TLS and PKI training and books
Feisty Duck is a computer security education business founded in 2009 and run from London by Jelena and Ivan Ristić. It publishes technical books using a continuous publishing model, which allows updates to be released as technology changes, and offers in-depth security training courses. The company also operates Hardenize, a network and application security monitoring platform.
Its book catalogue includes Bulletproof TLS and PKI, Apache Security, ModSecurity Handbook, and OpenSSL Cookbook, alongside the Practical TLS and PKI training course. Hardenize provides website discovery and inventory, host and network monitoring, and protocol coverage across TLS, PKI, email, and application security, with certificate inventory, CT monitoring, and expiration monitoring, plus integrations with AWS, Azure, and GCP and a semantic search engine. The business also publishes a periodic Cryptography & Security Newsletter and maintains an SSL/TLS and PKI history resource.
The books and training are aimed at system administrators, developers, and IT security professionals. Hardenize is packaged as a monitoring platform for discovering and monitoring network assets. Specific plan structures, trials, and pricing details are not stated on these pages.
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