Ah, I didn't know about the PGP code size. Point taken about the cost, and I hope you can sell to organizations. I'm surprised I can buy a competitor for £8, but then I can't run the proprietary programming software or, I assume, re-flash it. I'm happy to support a free software project anyhow. I wish I could register my Somu with the work Duo system rather than the display-a-number-you-type HOTP keys they reluctantly issue as the expensive alternative to expecting us to use personal phones for such purposes. Phishing, we've heard of it.