July 14, 2006 12:39 PM PDT

Skype protocol cracked?

A correction was made to this story. Read below for details.

Chinese engineers have allegedly cracked Skype's Internet telephony protocol, according to a Thursday blog posting.

If the blog posting is correct, software developers who currently don't have access to Skype's protocol could develop and sell alternative Skype clients. This could prove problematic for eBay, which has kept the protocol private since acquiring Skype last year.

Charlie Paglee Charlie Paglee

In a statement, a Skype representative acknowledged but dismissed the claim.

"We have no evidence to suggest that this is true," the representative said. "Even if it was possible to do this, the software code would lack the feature set and reliability of Skype, which is enjoyed by over 100 million users today. Moreover, no amount of reverse engineering would threaten Skype's cryptographic security or integrity."

Charlie Paglee, chief executive of Vozin Communications, a company that sells a voice over Internet Protocol (VoIP) plug-in called Talqer, first reported the claim on his VoIPWiki Blog. Talqer enables Google Talk users to make phone calls from their PCs to regular phones.

Paglee detailed a conversation he had with the Chinese engineers about the reverse-engineered VoIP technology. He said he was able to verify that they were using the Skype protocol, but he said the quality of the call was not as good as calls made using the actual Skype service.

After about 10 minutes, he said, the call was actually dropped. Paglee would not identify the company that allegedly cracked the Skype protocol; he said the start-up is still operating in stealth mode.

"Right now, it's still not quite there," he said. "But they've only been working on this for about eight months. I expect in a couple of weeks, they will have something working that has a lot better quality than what they showed me."

While Skype publishes application-specific interfaces, or APIs, for developers who want to provide add-on applications for the Skype service, it has kept its protocol that allows the actual Skype client software to communicate with other Skype clients a secret.

Because Skype's protocol is proprietary, third-party developers are not able to develop applications that align closely with the client software. Other VoIP applications, including Google Talk, have opened their protocol to the public, allowing companies like Vozin to develop service add-ons that are specific to the software client.

Paglee said the Chinese start-up plans to license its reverse-engineered protocol to third-party developers, which will be able to embed it in software used to build Skype-compatible applications. For example, Vozin could use the protocol to build a plug-in that would allow Skype users to make calls to and accept calls from regular phones without buying the PC-to-phone service from Skype.

Paglee said the effect on Skype could be devastating.

"It's safe to say that Skype is more popular than any other VoIP provider," he said. "And if this Chinese company could open the protocol and license it to other companies, and developers come up with applications that are better than Skype's, then they can really take revenue away from Skype."

 
Correction: The story incorrectly stated Skype's policy on providing access to its technology to develop add-on services. Skype does in fact provide application specific interfaces or APIs, which third party developers can use to develop applications to compliment the Skype service.

See more CNET content tagged:
Skype, protocol, VoIP, client software, Google Talk

2 comments

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Closed network services are a bad idea
Anyone find it silly that a user of one Internet phone service (eg Vonage.com) can't call another Internet phone user of another company (eg Broadvoice.com) without traversing the PSTN when this call could be simply a point to point call on the internet? No PSTN, No Tax.

Skype provides the ability for users to call each other and make and receive calls on the PSTN network. Currently skypes network is also closed. Although they are not required to provide and 911 services because the service only works with the computer. I do believe that there are some stand alone hardware products currently in development or production for skype. So how long will they be able to get away from that?

I would consider myself far from being an expert on and legal matters, but I think instead of developing new ways to Tax Internet phone users, the FCC should require Internet Phone Services which actually access the PSTN to be interoperable and peer with each other.

Does ebay pay money to get a story about skype every 2 days on cnet?

Try gizmoproject.com for a breath of fresh air.

KieranMullen
Posted by kieranmullen (1070 comments )
Reply Link Flag
try gizmoproject.com
Free shared call in numbers. Cheap call our minutes. An open network peering with other networks. Use any sip based hardware or software. The way communications should be.

KieranMullen
Posted by kieranmullen (1070 comments )
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