Codex for x lite softphone
So you need a codec that not only compresses the audio very well, it also breaks the statistics up quite well. So lets assume you just compressed your digitised voice track (A-Law coded 12 to 8 bit is very common and easy to do) then used plain oldd ECB encryption well a simple analysis of what is in effect a substitution cipher recovers the audio envelope fairly easily which as I indicated kind of gives the speach content away… Now your music realy speaks to you and such a system is known as a vocoder and various bands used it the one most remember is the end of “Mr Blue Sky” from ELO, where in the dying moments a ninstrument quite clearly says “please turn me over” (originaly it was the last track on side A of the “LP Record” Album. You can improve things a bit by spliting the spoken audio up into five or six spectral bands and use the envelops to those bands to modulate the spectrum split music. Guess what many people can hear the words and understand them. Then you can do similar things with phonems because many languages are actually phonem insensitive.įor instance you want to see just how bad it can be, take a section of spoken audio strip the envelop and use it to modulate a section of music which has been amplitude limited. Likewise quite a few consonants can be swapped removed or be added with no loss of intelligerbility. You can actually take out vowels swap them with different vowels and add extra vowels and with little difficult understand what is being said. Yes iit is quite difficult for a number of reasons.įirstly the human voice is full of redundancy as are most languages. Wonder if really would be al telephone network), I wonder if really would be al that hard to encrypt their voices themselves Tags: feudal security, privacy, Skype, surveillance And all we can do is ask them nicely to tell us first. Microsoft has reasons to be trustworthy, but they also have reasons to betray our trust in favor of other interests. We have no choice but to trust Microsoft. In addition it asks for quantitative data about when, why, and how Skype shares data with third parties, including governments. The letter calls upon Microsoft to publish a regular Transparency Report outlining what kind of data Skype collects, what third parties might be able to intercept or retain, and how Skype interprets its responsibilities under the laws that pertain to it. The group claims that both Microsoft and Skype have refused to answer questions about what kinds of user data the service retains, whether it discloses such data to governments, and whether Skype conversations can be intercepted.
“Many of its users rely on Skype for secure communications-whether they are activists operating in countries governed by authoritarian regimes, journalists communicating with sensitive sources, or users who wish to talk privately in confidence with business associates, family, or friends,” the letter explains.Īmong the group’s concerns is that although Skype was founded in Europe, its acquisition by a US-based company-Microsoft-may mean it is now subject to different eavesdropping and data-disclosure requirements than it was before. The effects of this model were in the news last week, when privacy activists pleaded with Skype to tell them who is spying on Skype calls. Basically, between cloud services and locked-down end-user devices, we have less control and visibility over our security-and have no point but to trust those in power to keep us safe. Lately I’ve been thinking a lot about power and the Internet, and what I call the feudal model of IT security that is becoming more and more pervasive.