mcsolas - Slashdot User

Comment the grid (Score 1) 456

by mcsolas on Tuesday February 23, 2010 @11:22AM (#31244776) Attached to: Things To Look For In a Web Hosting Company?

For me, I was having problems with webcams I have setup to overlook a beach getting too popular and taxing the server, so the host kept changing the file permissions on it to not display.. breaking my feed. so, literally, a single image sent me looking for a new host. If you are able to run your apps on a LAMP stack, I suggest looking into grid based hosting. Detaches you from the problems of a single server overload... which is how most shared hosts are set. I ended up at media temple and have my cam back online and the site is snappy. Support has been very good, although it does take them 20-24 hours in most cases.. so not the fastest but so far they have been very good in their replies and I am a happy customer. If your interested.. check this coupon, 20% off their plans for the life of the plan. worked for me like 2 weeks ago, should show you the discount price before you checkout as well.. so you can see. I ended up prepaying for a year on their grid services. http://www.retailmenot.com/view/mediatemple.net best of luck finding a new host.

Phony TCP Retransmissions Can Hide Secret Messages 188

Posted by Soulskill on Wednesday May 27, 2009 @09:41AM from the tricky-packets dept.

Hugh Pickens writes "New Scientist reports that a team of steganographers at the Institute of Telecommunications in Warsaw, Poland have figured out how to send hidden messages using the internet's transmission control protocol (TCP) using a method that might help people in totalitarian regimes avoid censorship. Web, file transfer, email and peer-to-peer networks all use TCP, which ensures that data packets are received securely by making the sender wait until the receiver returns a 'got it' message. If no such acknowledgment arrives (on average 1 in 1000 packets gets lost or corrupted), the sender's computer sends the packet again in a system known as TCP's retransmission mechanism. The new steganographic system, dubbed retransmission steganography (RSTEG), relies on the sender and receiver using software that deliberately asks for retransmission even when email data packets are received successfully (PDF). 'The receiver intentionally signals that a loss has occurred,' says Wojciech Mazurczyk. 'The sender then retransmits the packet but with some secret data inserted in it.' Could a careful eavesdropper spot that RSTEG is being used because the first sent packet is different from the one containing the secret message? As long as the system is not over-used, apparently not, because if a packet is corrupted, the original packet and the retransmitted one will differ from each other anyway, masking the use of RSTEG."

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