![]() ![]() Skype, the online phone service long favored by political dissidents, criminals and others eager to communicate beyond the reach of governments, has expanded its cooperation with law enforcement authorities to make online chats and other user information available to police, said industry and government officials familiar with the changes. The Washington Post covered the insecurities of Skype: The encoding can help those who don’t want the internet or the police to read what they’re saying. ![]() They found they could transmit secret text, audio or video during Skype calls at a rate of almost 1 kilobit per second alongside phone calls. “The secret data is indistinguishable from silence-period traffic, so detection of SkypeHide is very difficult,” says Mazurczyk. The Skype receiver simply ignores the secret-message data, but it can nevertheless be decoded at the other end, the team has found. ![]() The team hijacks these silence packets, injecting encrypted message data into some of them. Rather than send no data between spoken words, Skype sends 70-bit-long data packets instead of the 130-bit ones that carry speech. Mazurczyk and his colleagues Maciej Karaś and Krzysztof Szczypiorski analysed Skype data traffic during calls and discovered an opportunity in the way Skype “transmits” silence. Now that you know you can send a secret Skype message-don’t you want to? New Scientist reports: But researchers at the Institute of Telecommunications in Warsaw, Poland have figured out a way to let users hide information in packets, silently and wordlessly. Have you ever wished you could send whoever you’re Skyping a secured, encoded message? Well, honestly, you may not have thought of the possibility.
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