Ein polnischer Wissenschaftler hat eine Methode entwickelt, um über den Pitch geheime Botschaften in Techno-Tracks zu verstecken. Vom Discover Mag: Algorithm Weaves Secret Messages into Dance Music.

Krzysztof Szczypiorski, a researcher from Poland, has developed a technique to hide messages inside dance music using subtle variations in tempo. By raising or lowering the speed of the music at levels not detectable by humans, he transmits a series of Morse code-like signals that can be picked up by a computer program. The sonic dots and dashes are then put together to spell out a message.

Aus dem Paper: StegIbiza: New Method for Information Hiding in Club Music

For the proof of concept this work used […] Logic X Pro by Apple. […] Based on MIDI (Musical Instrument Digital Interface) files this work prepared five covers of popular songs with a constant tempo:
 — “Lily was here” by David A. Stewart and Candy Dulfer (131 bpm).
 — “Miracle” by Queen (92 bpm).
 — “Rhythm is a dancer” by Snap! (130 bpm).
 — “So what” by Miles Davis (120 bpm).
 — “You were the heart’s beat” (in Polish: “Byłaś serca biciem”) by Andrzej Zaucha (100 bpm).

All original covers were prepared without any vocal parts and arranged in techno, hip-hop, or trance styles with the instruments available in Logic X Pro. The chosen hidden message was “steganography is a dancer!”, which when encoded into a Morse code looks like:

… — . — . .- -. — — — . .-. .- . — . …. -. — .. … .- -.. .- -. -.-. . .-. -.-. —

and then adopted to the StegIbiza (Figure 4) containing 88 symbols:

+++0–0+0 — +0+-0-+0 — -0 — +0+-+0+-0+ — +0++++0-+ — 00++0+++00+-00-++0+-0-+0-+-+0+0+-+0-+-+ —

Originally posted on Nerdcore.de: http://ift.tt/2bYoqbL