When a call is made the voice data is encrypted user to user, and no call media-data is maintained by the system. Call meta-data is maintained for a period of seven days, after which only anonymised aggregated data is stored for statistical purposes, and the original data deleted. When a message is sent the message is encrypted user to user and stored on our server for a maximum of 5 days, whilst pending delivery. The message is deleted once delivered, or after the 5 day period has elapsed. Message meta-data is maintained for a period of seven days, after which only anonymised aggregated data is stored for statistical purposes, and the original data deleted. The exception to this are message-statuses which are stripped of user meta-data. When an attachment is sent the attachment and corresponding message is encrypted user to user, and stored on our server for a maximum of 5 days, whilst pending delivery. The message is handled the same was as a normal message. The attachment is stored for a period of 30 days, after which it is deleted.