Public key cryptography is an essential part of connecting to resources over a public or shared network. Public key infrastructures are not secure connections and can be accessed by anyone without much effort. In order to protect your personal data, company data and other information you have to use some method which provides a secure connection.
Public Key Cryptography Allows Your Users to Transmit Encrypted Data over Public Networks
Public and shared network connections include free Wi-Fi spots and internet connections. In order to safely make a connection your users should be using digital certificates created using public key cryptography. The digital certificates are used to encrypt data sent over the public or shared connection. The data can be decrypted once it reaches its location using a matching private key. Without the matching private key, the data will remain encrypted.