Summary
In this chapter, we focused on asymmetric and hybrid cryptosystems, learning about the kinds of problems that they help solve.
On the practical side, we learned about managing public and private keys within a Node.js application. We then implemented encryption and decryption using RSA, both standalone and in a hybrid system with AES. Lastly, we learned about key agreements with Diffie-Hellman algorithms, specifically the ECDH variant, which is based on ECC, and we used them to perform hybrid encryption with ECIES.
In the next chapter, we'll look at another very common use of public-key cryptography, which is digital signatures. We'll understand their purpose and how we can calculate and verify them in a Node.js application.
