state of the art measurement equipment for the wind industry
since 1989, marketed in more than 100 countries


Data Security with Ammonit: 100% Traceability and 100% Protection

Conveniently fulfil the high data quality standards in IEC, MEASNET and Germany's TR6 by using Ammonit Meteo-40 data loggers and our online monitoring platform AmmonitOR. Implemented security features protect your valuable measurement data from manipulation and unauthorized access. Based on the internationally accepted OpenPGP standard we use Public Key cryptography to secure data authenticity and integrity with digital signatures and encryption.

Ammonit Datensicherheit


Digital Signature


A valid digital signature indicates to the recipient that the message was created by a known sender (authentication) and that the message was not manipulated on transit (integrity).

Digitally signed messages and files can be read by the recipient without additional software. When it comes to verifying digital signatures, you require external software.

Encryption is a process of encoding messages or information in a way that only authorized parties can read it. The message or information is encrypted using an encryption algorithm, generating ciphertext that can only be read if decrypted. An authorized recipient can easily decrypt the message with the key provided by the originator to recipients.

Unauthorized interceptors are not able to read encryped messages and files. For decryption, the corresponding key and additional software are required.


How it works:

In the configuration process you can configure your Meteo-40 data logger and your AmmonitOR project to sign + encrypt or only to sign data. However, you do not have to protect your data with the options, but it is highly recommended.

In order to verify the digital signature we developed the online service Ammonit Verify ( The service is free of charge and 24/7 online available. You do not need to register for the service and Ammonit Verify does not store any of your data. To use the service, you only have to upload your data file (.csv or .csv.gz) and the matching signature file (.csv.sig). Ammonit Verify immediately shows the validity of the digital signature.

If you have encrypted your data, you require additional software for decryption, which is not available on Meteo-40 or AmmonitOR. There are various programs on the market. For Windows™ users we recommend using the free software Gpg4win.

Download: Gpg4win
Download: Quick Guide Digital Signature and Encryption (English, PDF)

Each Meteo-40 data logger and each AmmonitOR installation has is own unique Private Key, which is not accessible. For each Private Key, there is a corresponding Public Key accessible on each Meteo-40 and AmmonitOR. The Public key is used to verify the Private Key. To do so, you have to import and certify the Public Keys of your Meteo-40 data loggers and your AmmonitOR installation in the Gpg4win software. After verifying the Public Keys, you can validate digital signatures and decrypt messages and files. You can find a detailed description of the process in our manuals:

Download: Manual Meteo-40 (English, PDF)
Download: Manual AmmonitOR (English, PDF)

How is your measurement campaign?

Measurement data complete?
Data quality good enough for MEASNET?
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Battery voltage satisfactory?

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