Paragon Initiative Enterprises Blog

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

Preventing Timing Attacks on String Comparison with a Double HMAC Strategy

Preventing side-channel attacks (i.e. timing attacks on MAC validation) and dangerous compiler optimizations with a blinded comparison.


Coming to WordPress 4.4: CSPRNG

In version 4.4 and on, WordPress's random number generator function (wp_rand) will now be cryptographically secure.


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.


How to Safely Implement Cryptography Features in Any Application

No matter what language you're developing in, there's really only one cryptography library that shines above the rest.


The State of Cryptography in PHP

With PHP 7 nearing its official release, let's reflect on the state of cryptography in PHP applications.


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.


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.


Using Encryption and Authentication Correctly (for PHP developers)

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


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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