qca1: qca1 (Qt Cryptographic Architecture) qca1: qca1: QCA aims to provide a straightforward and cross-platform crypto API, qca1: using Qt datatypes and conventions. QCA separates the API from the qca1: implementation, using plugins known as Providers. The advantage of qca1: this model is to allow applications to avoid linking to or explicitly qca1: depending on any particular cryptographic library. This allows one qca1: to easily change or upgrade crypto implementations without needing qca1: to recompile the application. qca1: qca1: QCA was written by Justin Karneges.