Ben Laurie has announced the open source project Caja (Capability Javascript): «Caja represents our discovery that a subset of Javascript is an object-capability language.» Ben Laurie is running a team at Google that is implementing capabilities in Javascript: «… rather than modify Javascript, we restrict it to a large subset. This means that a Caja program will run without modification on a standard Javascript interpreter - though it won’t be secure, of course! When it is compiled then, like CaPerl, the result is standard Javascript that enforces capability security. What does this mean? It means that Web apps can embed untrusted third party code without concern that it might compromise either the application’s or the user’s security.». See also the Caja discussion group. [via]
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