In the development of the Internet, more attention was paid to the reliability of communication channels than to data security. The transport is unencrypted by default. However, the data of a user on the way through the Internet, but only due to the enormous mass of constantly moving packages already quite well protected. At the provider of the sender and receiver or in the case of the iPad and iPhone at the operator of the hotspot, however, all data packets must pass. At these two points, the information can be filtered out and "recorded".
The solution to the problem is called data encryption. Either you send encrypted archives or use a secure connection. Most standard protocols on the Internet have encrypted versions. These establish a secure connection from the client program on your iPad via the Internet to the remote site.
Secure protocols for internet connection
An example is surfing via https. An SSL-encrypted connection is established between Safari on the iPad (or iPhone) and the web server. Other encrypted protocols include SFTP for Internet Filesharing (instead of FTP ) and SSH for remote logon (instead of Telnet). Everyone creates a secure data channel through the Internet. Mail and chat connections can also be secured. An encrypted WLAN does not help, as only the connection from the client to the base is secured.