Apple has removed apps from its App Store that could be used to monitor information sent to and from iPhones and iPads.
Yesterday Apple took down several apps in light of fears they could violate users' privacy. The move follows the discovery of more than 20 malware-infected apps in the App Store last month.
The apps were removed for installing root certificates, which could allow a third party to see encrypted data sent to and from Apple devices.
"We've removed a few apps from the App Store that install root certificates which enable the monitoring of customer network data that can in turn be used to compromise SSL/TLS security solutions," an Apple spokesperson said.
"We are working closely with these developers to quickly get their apps back on the App Store, while ensuring customer privacy and security is not at risk."
In general, the deleted apps seem to have been installing these certificates to allow ads to be blocked, and the developers are not believed to have acted maliciously. Those affected, including content blocker Been Choice, are said to be working with Apple to get new versions of the apps back into the store.
Three weeks ago more than two dozen infected Chinese apps - including an older version of the popular WeChat messenger - were uncovered in the App Store - in what was thought to be the biggest breach of the tightly-controlled software portal.