The session keys (session IDs ) are generated from variable data of the visit to a website, such as the IP address and the timestamp, and are transmitted with the URL. These session keys are required, for example, to uniquely identify the users of the shopping cart. Nowadays streaming with the URL has been deprecated (for example: www.domain.tld / index? Sid = d4ccaf2627557c756a0762419a4b6695 ). Identification in the website header as a cookie has become more common.
The temporary caching of information is also encrypted with hashes so that unauthorized users cannot draw any conclusions about the visited websites and cannot obtain access or payment data by viewing the cache.
Communication between the FTP server and the client is similar when using the SFTP protocol.