Paragon Initiative Enterprises Blog

The latest information from the team that develops cryptographically secure PHP software.

Protecting RSA-based Protocols Against Adaptive Chosen-Ciphertext Attacks

A deep dive into preventing chosen-ciphertext (e.g. padding oracle) attacks against RSA in custom encrypted transport protocols.


Assuring Ciphertext Integrity for Homomorphic Cryptosystems

How to build a homomorphic encryption scheme that is not vulnerable to chosen-ciphertext attacks, using blockchain-like protocols.


Let's Make 2017 the Year of Simply Secure PHP Cryptography

Our plan to make libsodium a core PHP extension and write a userland polyfill for PHP 5.2.4+


Do-It-Yourself Hand-Crafted, Boutique, Artisinal Cryptosystems

How to quickly and effectively design a secure, custom cryptography protocol for your applications.


Need Technology Consultants?

Will tomorrow bring costly and embarrassing data breaches? Or will it bring growth, success, and peace of mind?

Our team of technology consultants have extensive knowledge and experience with application security and web/application development.

We specialize in cryptography and secure PHP development.

Let's Work Together Towards Success

Our Security Newsletters

Want the latest from Paragon Initiative Enterprises delivered straight to your inbox? We have two newsletters to choose from.

The first mails quarterly and often showcases our behind-the-scenes projects.

The other is unscheduled and gives you a direct feed into the findings of our open source security research initiatives.

Quarterly Newsletter   Security Announcements