Most articles about RSA present public keys as a pair of numbers: a public exponent e, usually 65537, and a modulus n. But RSA keys are not sent as plain numbers: they are encoded as bytes using a given key format. A common one is described in RFC3447, appendix A.1 and is often called PKCS#1…

Update (2017-04-12): Since March 2017, you can use Heroku’s Automated Certificate Management for your paid dynos.

Cryptosense hosts some of its applications on Heroku and as many others, we want to use HTTPS. Heroku applications automatically benefit from it…