Google+ users can upload photos and videos to Google’s cloud via Instant Upload. Photos aren t shared by default, but are stored on a private Picasa Web folder for future sharing. To disable Instant Upload, click into the app, Menu > Settings > and at the top of the screen uncheck Instant Upload s Instant Upload Mobile becomes a prime phishing attack vector, hackers will increasingly employ machine learning in attacks and cloud will increasingly be seen as fertile ground for compromise.
Source: https://threatpost.com/instant-upload-yes-err-no-wait/91849/