The neo-Nazi movement is a world-wide phenomena that is, to say the least, disturbing and morally repugnant.
Neo-Nazism borrows elements from Nazi doctrine, including militant nationalism, racism, xenophobia, homophobia, and antisemitism. Holocaust denial is a common feature, as is incorporation of Nazi symbols and admiration of Adolf Hitler. It is related to the white nationalist and white power skinhead movements in many countries ... According to the annual report of Germany's interior intelligence service for 2012, at the time there were 26,000 right-wing extremists living in Germany, including 6,000 neo-Nazis. Neo-Nazi organizations, related and derivative symbols and Holocaust denial are outlawed in Germany according to the German Criminal Code [Source: Wikipedia]
The German government's fight against neo-Nazis has been waged since it appeared in the 1960s and a significant increase in neo-Nazi activities followed re-unification in the 1990s. Not surprisingly, investigating neo-Nazi activities can be complex and time consuming but one area of police work, identifying neo-Nazi music which is, according to a report in Der Spiegel, effectively "a gateway drug" used to lure under-18s into the "far-right youth scene," may soon be detected by smartphone-based technology.
The regional police office in the eastern state of Saxony has developed a prototype system of registering audio fingerprints from neo-Nazi rock. It has the advantage of "sparing resources and enabling very quick investigations," said an internal government assessment.
In other words, they've developed what's been dubbed "Nazi Shazam." If you've not used Shazam I'd be surprised but on the rare chance you haven't, the Shazam app (which is available on just about every platform) can "listen" to a few seconds of music and compare a fingerprint of the sound to its database to determine what is being listened to and it is remarkably accurate. Apparently the Saxony police app does something very similar but focussed on neo-Nazi music.
Obviously there are legal ramifications that have to be addressed before this technology goes live but giving the police a fast and effective way of identifying neo-Nazi music will be a potentially powerful tool.