Delay iOS updates on Supervised devices with iOS 11.3

As with all iOS x.3 (i. e. 9.3, 10.3) updates, Apple addresses mainly enterprise users. This time, Apple integrated a new useful functionality that will make IT departments feel relieved: on devices with iOS 11.3 there is a possibility to delay system updates for up to 90 days. The release of iOS 11.3 is expected for Spring 2018.

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Third-Party Keyboards in Enterprises – A quick analysis of risks

The use of third-party keyboards is widespread, especially in the private sector. The spread is explained by the advantages of such extensions, as they facilitate the creation of longer texts on touchscreens of modern smartphones considerably, for example, by the following functions:

  • Swiping gestures allows messages to be typed much faster
  • Through powerful analysis algorithms, words can be proposed and easily adopted through autocompletion
  • By providing speech recognition, texts are now recognized quite reliably

At first glance, these features may be helpful to increase productivity significantly. However, the risks involved in using the functions must not be disregarded.

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The security behind Touch ID and Face ID

With the introduction of iPhone X and the new biometrical security feature Face ID in September 2017, new security concerns of users arise. In the center of all discussions are concerns regarding data privacy, since the iOS devices are now storing finger prints (Touch ID) or the users’ face (Face ID). The following article focuses on diminishing with (negative) rumors and gives an overview about the topic.

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Automatic renewal for Let’s encrypt certificates

I have been using SSL certificates that were issued and signed by Let’s Encrypt for a few months now. Besides the fact, that those SSL certificates are signed for free and accepted and known by most of modern internet browsers and other applications (even OwnCloud recognizes them), there is one smaller impediment: the certificates are issued for three (3!) months and have to be renewed manually. I will describe in this article, how to perform automatic renewals by using Cron and only a few gimmicks.  Continue reading

Hint: ssh-copy-id and different ssh port

ssh-copy-id is a dedicated tool to set up public key authentication via ssh between two linux machines. You will get a problem, if the ssh daemon is listening on a different port (for example: 2222). The standard ssh-copy-id command in Ubuntu Linux doesn’t support a custom SSH port. According to the man page there are only a few parameters available:

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