Apple Security Advisory 2011-07-25-2 – The iOS 4.2.10 software update addresses a certificate chain validation issue. The issue existed in the handling of X.509 certificates where an attacker with a privileged network position may capture or modify data in sessions protected by SSL/TLS. Other attacks involving X.509 certificate validation may also be possible

Vanish is a research system designed to give users control over the lifetime of personal data stored on the web or in the cloud. Specifically, all copies of Vanish encrypted data — even archived or cached copies — will becomepermanently unreadable at a specific time, without any action on the part of the user or any third party or centralized service.