Paragon Initiative Enterprises Blog

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

Securely Implementing (De)Serialization in PHP

Deserializing a string into a data structure is a simple task riddled with security holes.


Introducing CMS Airship: A Secure Content Management System for the Modern Web

The beta release for a secure-by-default CMS built by Paragon Initiative Enterprises


One Login To Rule them All - Seamless and Secure Cross-Domain Authentication

How to authenticate a user on multiple domains without violating the Same Origin Policy.


How to Safely Store Your Users' Passwords in 2016

Salted Password Hashing with Argon2, Scrypt, Bcrypt, and PBKDF2


On The Design and Implementation of a Stealth Backdoor for Web Applications

Or: How I won the password hashing category for the Underhanded Crypto Contest at DEFCON 23.


How to Securely Allow Users to Upload Files

The theory and practice of securing file upload form handlers. Our examples are in PHP, but many of the filesystem security concepts here are language agnostic.


Building Secure Web Applications in PHP

Don't just fix security vulnerabilities, prevent the habits that cause them in the first place.


The Comprehensive Guide to URL Parameter Encryption in PHP

If you ever wondered the best way to encrypt a username or row ID for an obfuscated URL in PHP, this is the article for you.


Implementing Secure User Authentication in PHP Applications with Long-Term Persistence (Login with "Remember Me" Cookies)

Login forms with a remember me checkbox are a common requirement. We explore the security of login forms and a robust model for remember me checkboxes.


The Fast Track to Safe and Secure PHP Sessions

How to configure and use PHP's build-in session management system for maximum security.


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