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April 11, 2012 04:05 pm

Mosh: Modernizing SSH With IP Roaming, Instant Local Echo

An anonymous reader writes "Launched in 1995, SSH quickly became the king of network login tools, supplanting the old insecure mainstays TELNET and RLOGIN. But 17 years later, a group of MIT hackers have come out with "mosh", which claims to modernize the most annoying parts of SSH. Mosh keeps its connection alive when clients roam among WiFi networks or switch to 3G, and gives instant feedback on typing (and deleting). No more annoying network lag on typing, the MIT boffins say, citing Bufferbloat, which has been increasing latencies."The folks involved have a pre-press research paper with the gritty details (to be presented at USENIX later this year). Mosh itself is not particularly exciting; the new State Synchronization Protocol it is based upon might be: "This is accomplished using a new protocol called the State Synchronization Protocol, for which Mosh is the first application. SSP runs over UDP, synchronizing the state of any object from one host to another. Datagrams are encrypted and authenticated using AES-128 in OCB mode. While SSP takes care of the networking protocol, it is the implementation of the object being synchronized that defines the ultimate semantics of the protocol."

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