Android Support for Elliptic Curves (EC) in KeyPairGenerator

This article discusses the support for elliptic curves on Android. Its primary audience are engineers implementing or maintaining cryptographic protocols on Android. It hopefully also shows up as a helpful result when searching for error messages. During a recent cryptography project on Android, I found that only few Elliptic Curves are supported by the built-in key pair generator. The typical error messages I got were along the line of java.security.InvalidAlgorithmParameterException: unknown curve name....

2021-07-10 · 6 min · Daniel

Password Hashing on Android

This article explains why password hashing is important and how to do it properly on Android. The primary audience are software engineers working with passwords. Password hashing or password-based key derivation takes a password from the user as input and generates key material as output. This is a helpful thing because many people struggle to memorize 256-bit encryption keys. The standard procedure is to pass the user password through the password hashing function, and then use the derived key for cryptographic operations....

2021-06-14 · 5 min · Daniel