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Simsme

The free Secure Instant Messenger by Deutsche Post — for confidential communication using your smartphone — on both Android and iOS.

Download on the AppStoreJetzt bei Google Play

SIMSme is the new Secure Instant Messenger by Deutsche Post AG. With more than 500 years of experience with the transmission of messages, Deutsche Post is the perfect partner when it comes to reliable and secure communication

Highlights

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Encrypted Instant Messenger

SIMSme transmits your texts, images, videos, locations or contact data to your business partners immediately and completely secure using end-to-end encryption - entirely free of charge. No eavesdropping possible. Not even by us.

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Security

SIMSme makes the security of your communications its top priority. In addition to encryption and password protection, SIMSme also offers the possibility of checking your contacts via a QR code scanning process — so you can be sure of their identities. By the way: SIMSme uses your address book. You do not have to re-invite your contacts.

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Self-destruct feature

Especially important messages can be given an additional layer of security with the self-destruct feature. You can either set up a countdown so that your message can only be read for a certain amount of time or select an expiration date for the message. This will automatically make it disappear at the desired time. You therefore leave no traces on the web.

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FAQs

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Can I use the SIMSme backup function to transfer existing cloud solutions to a new mobile?

The key used by SIMSme to encrypt or decrypt messages is device-specific. This is in the interest of security, which is at the core of SIMSme: Only this ensures that a SIMSme version cannot be "cloned" on a different device, thereby preventing identity theft. This means that when a new device is purchased, SIMSme must be downloaded again and the registration must be repeated.

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How can I assign images to my contacts?

SIMSme users can only assign an image to themselves. The image that is shown alongside the contacts is thus the one that your contacts have themselves selected upon registration.

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Why do I keep receiving a message saying that one of my SIMSme contacts has recently registered even though they are a SIMSme contact already?

If one of your contacts re-registers (for instance, because they have forgotten their password), they are identified as a new user. A new message providing information about this is then sent out as well.

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How is SIMSme financed? Are advertisements displayed? How does SIMSme manage to be and to remain free of cost?

With a little imagination, it is possible to conceive a variety of re-financing models: We are, for instance, also thinking of offering SIMSme as a secure communication tool for corporate use in the future, albeit at a cost. For private users, however, SIMSme will always remain free of charge.

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How is SIMSme to be made more widespread? What plans do you have to make it appeal to the masses?

Firstly we are naturally investing more in increasing the awareness of the SIMSme brand and secondly we are also continuously developing SIMSme further so as to excite our users about our product. What is clear is that SIMSme can only be enjoyed once it becomes sufficiently widespread. Every little bit will help in the future. This is why we have the following request to make to our users: If you like SIMSme, tell your friends about it!

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Are other operating systems (including Windows, Blackberry or Amazon) going to be supported in the near future, too? Are there plans for a desktop version?

We are taking a close look at what our customers want and which other systems are being requested. If there is sufficient demand then naturally we will make SIMSme available to operating systems other than Android and iOS versions. We are also testing a Desktop version. Because of the end-to-end encryption, however, desktop and multi-device operation is no trivial matter.

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Have the initial problems (overload, inability to register, delayed message transmission) now been eliminated? What was the reason for this overload? Deficient server capacity, bugs in the software, unexpected demand?

The initial problems that we unfortunately experienced have been eliminated in the meantime. We increased our server capacity ten-fold within the first few days and things have stabilised since then.

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Is the secret key provided only to the user? If so, would all communication be lost if the application were to be re-installed?

The secret key is, indeed, only provided to the user. In the case of re-installation, all previous chats would therefore be lost. We are planning a solution that would give users the opportunity to transfer or backup their data to another device via the cloud at their own risk. Solutions of this kind may, however, involve compromises in terms of security.

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Are images/videos compressed for purposes of transmission in order to ease traffic?

Yes, images and videos are compressed for purposes of transmission. This eases traffic and also causes calculations made during the encryption process to be curtailed. However, we are concomitantly working towards a function enabling users to send their images and videos in their original resolution if they so wish.

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Where exactly are the servers that are responsible for making SIMSme available?

The servers are located in Germany – in the vicinity of Berlin, to be precise.

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Regarding self-destructing messages: What happens if my chat partner is absent at the time and the countdown has expired? Does the countdown begin only once they are also sure to have read the message or immediately after the message is sent?

Naturally the countdown begins only once the chat partner has also opened the message. To be precise, the chat partner must keep their finger on the screen for the message to be displayed. As an alternative to the countdown, however, a time can be pre-defined if such a function is desired. In this case, the chat partner will then indeed only be able to view the message up to a particular time. If the message has not been read by that time then it will no longer be available.

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Are you considering introducing a setting to the function so that the password would not be requested each time the application is launched?

This is already possible: The automated password request feature can be completely turned off or configured so that the password is only requested after 1, 5 or 10 minutes after the application was last in use. However, this is purely for convenience and is not recommended by us as it can involve compromises in terms of security.

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Simsme

The free Secure Instant Messenger by Deutsche Post — for confidential communication using your smartphone — on both Android and iOS.

Download on the AppStoreJetzt bei Google Play