Paragon Initiative Enterprises Blog

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

You Wouldn't Base64 a Password - Cryptography Decoded

A human-readable overview of commonly misused cryptography terms and fundamental concepts.


Common Uses for Cryptographically Secure Random Numbers

Some useful things that can be built with a CSPRNG.


How to Securely Generate Random Strings and Integers in PHP

A lesson on cryptographically secure pseudorandom number generators in PHP, and how to generate random integers and strings from a high quality entropy source like /dev/urandom to generate secure random passwords in PHP.


On Estimating the Impact of a Software Vulnerability

What is the potential impact of a given vulnerability? This isn't easy to answer.


Everything You Need to Know About Preventing Cross-Site Scripting Vulnerabilities in PHP

Although Cross-Site Scripting is one of the most common vulnerabilities on the Internet, it remains an unsolved problem (unlike SQL Injection).


Preventing SQL Injection in PHP Applications - the Easy and Definitive Guide

It's 2015; there's no excuse for writing code vulnerable to SQL Injection any more


If You're Typing the Word MCRYPT Into Your PHP Code, You're Doing It Wrong

Alternative title: "Libmcrypt considered harmful." You should use libsodium if you can, or OpenSSL if you can't.


How to Teach Yourself Application Security

We're maintaining a curated appsec reading list on Github -- check it out.


Using Encryption and Authentication Correctly (for PHP developers)

A developer's short guide to encryption, authentication, and authenticated encryption with examples in PHP


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.


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