Hello, I am Benjamin, design lead at Meta.
I build cash-positive digital products that help people reach their goals.

There are two types of encryption: asymmetric and symmetric. Traces of symmetric encryptions can be found as early as 500 BC while asymmetric encryption was only invented in the 1970s. With symmetric encryption as with a safe, one key opens and closes. With asymmetric encryption, 2 keys exist, one for opening and one for closing.