Apple's effort to avoid becoming an on-demand data dispensary for authorities faces unlikely saboteurs: The company's commitment to convenience and its customers' preference for the same.

Russian digital forensics company Elcomsoft on Thursday published a blog post claiming that Apple's iCloud sync service stores phone call logs without user notification or consent.

In its May 2016 paper on iOS Security PDF , the company notes that iCloud sync captures call history, iMessage, text SMS , MMS messages, and HealthKit data, among other things.

In September, The Intercept reported that Apple stores logs of iMessage conversations.

Apple is deeply committed to safeguarding our customers' data.

Device data is encrypted with a user's passcode, and access to iCloud data including backups requires the user s Apple ID and password.

The text above is a summary, you can read full article here.