In our world today becuase of fast changing in technology, conversations can be made using telephones,mobilephones and even voice messaging over the internet is possible. It was made possible with the help of VoIP or Voice Over Internet Protocol.
VoIP is a protocol used to convert the voice signal into packets before being sent over the internet. This protocol is present to VOIP phones . Eavesdroppers are abundant around the world. It can be your seat mate in a bus or your friend in the neighborhood. If conversations of two individuals can be eavesdrop by someone from a distance, phone calls conversation can be too. Telephone call can now be listened through by wiretapping on the telephone line of one of the caller. VoIP phone calls can also be vulnerable to eavesdroppers by breaking through firewalled networks.
To address these problems according to the article, the John Hopkins University Researchers presented a compression technique called variable bit-rate encoding, which adjust the size of data packets being sent over the internet based on how mush information they actually contain. Encrypting the packets after thay have been compressed scrambles their content but somehow does not change the size. This technique would make a result of giving almost of the information to potential eavesdroppers. By the way, what is encryption? Encryption, for the benefits of those who is not familiar with, is a process of altering data into codes which the maker could only understand. The main pupose of encryption is to hide the real meaning of the message to potential and unwanted listeners.
According to the article, the technique presented by the researchers is good in terms of improving the quality of service of VoIP phones . The researcher's technique reduces the bandwith usage of the computer to protect the security of the VoIP phone call. But reducing the computer's bandwith can somehow affect the phone call security.
But their is still a solution in protecting your calls from eavesdroppers. You can use a special hardware such as Cryptophone. Making calls using cryptophoone is limited because it can only work with the other cryptophones. That is its disadvantage! Well, making phone calls secure form eavesdroppers is still an issue. To make sure their are no one listening to our calls, look around before you answer any call and keep your voice as low as possible.
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