Cryptography System for WL
I was the primary developer of the original cryptography functions shipped with every copy of Wolfram Language (Mathematica) since 2015 (version 10.1). Those functions include
PublicKey. Most of the functionality was backed by OpenSSL.
I wrote a post for the Wolfram Blog when the functionality was first instroduced (though I'm not sure how well my early high school writing holds up).