Cybersecurity, Cryptography.
RSA signatures hold up the trust of the Internet, and without it, we could not trust many of the sites we visit. I did a quick survey of the public keys for some sample Web sites, and I got: BBC.com: Elliptic Curve 256 NatWest.com: RSA Microsoft.com: RSA 2K Cisco.com: RSA 2K IBM.com: RSA 2K