If you and another person want to encrypt messages, should you provide that person with your public key, private key, or both?

your public key

Explanation:

The public key is an identifier that we can share at will that allows us bitcoins and cryptocurrencies by third parties. It is one of the two parts that make up the set of keys created by asymmetric cryptography to share secrets securely.

The public key is one of the two keys that an asymmetric cryptography procedure generates. Receive this name, by its English name, public key. Asymmetric cryptography is a crucial component for the operation of cryptocurrencies such as Bitcoin. Without it, cryptocurrencies could not exist as we know them. This system allows us to generate a pair of keys that are no more than two cryptographically linked text strings. These keys are called: private key and public key. In this explanation we will focus on the second one.

Something essential that we must understand is that; the private and public keys are mathematically related. In fact, the public key is always generated from the private key. This makes both keys directly linked. However, it is impossible to calculate or deduct the private key from the public key.