Secure information flow for concurrency

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Secure information flow for concurrency

Information flow security is that aspect of computer security concerned with how confidential information is allowed to flow through a computer system. This is especially subtle when considering processes that are executed concurrently. We consider the notion of Probabilistic Noninterference PNI proposed in the literature to ensure secure information flow in concurrent processes. In the setting of a model of probabilistic dataflowwe provide a number of important results towards simplified verification that suggest relevance in the interaction of probabilistic processes outside this particular framework:.

PNI is shown to be compositional by casting it into a rely-guarantee framework, where the proof yields a more general Inductive Compositionality Principle. We show that the simpler nonprobabilistic notion of Nondeducibility-on-Strategies proposed in the literature is an instantiation of PNI, allowing us to extend our results to it.

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No document with DOI "10.1.1.368.923"

Secure Information Flow for Concurrent Processes. Conference paper First Online: 21 December This is a preview of subscription content, log in to check access. A note on reactive refinement, Google Scholar. Rajeev Alur, Thomas A.

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Henzinger, Orna Kupferman, and Moshe Vardi. Alternating refinement relations.Abstract—Modern multicore hardware and multithreaded programming languages expose weak memory models to programmers, which relax the intuitive sequential consistency SC memory model in order to support a variety of hardware and compiler optimizations. However, to our knowledge all prior work on secure information flow in a concurrent setting has assumed SC semantics. This paper investigates the impact of the Total Store Order TSO memory model, which is used by Intel x86 and Sun SPARC processors, on secure information flow, focusing on the natural security condition known as possibilistic noninterference.

We show that possibilistic noninterference under SC and TSO are incomparable notions; neither property implies the other one.

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We define a simple type system for possibilistic noninterference under SC and demonstrate that it is unsound under TSO. We then provide two variants of this type system that are sound under TSO: one that requires only a small change to the original type system but is overly restrictive, and another that incorporates a form of flow sensitivity to safely retain additional expressiveness.

Finally, we show that the original type system is in fact sound under TSO for programs that are free of data races. Index Terms—information flow, language-based security, weak memory models I. Documents: Advanced Search Include Citations. VaughanTodd Millstein.

secure information flow for concurrency

Citations: 2 - 0 self. Abstract Abstract—Modern multicore hardware and multithreaded programming languages expose weak memory models to programmers, which relax the intuitive sequential consistency SC memory model in order to support a variety of hardware and compiler optimizations.

secure information flow for concurrency

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Secure Information Flow for Concurrent Processes

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Games discussed in the Daily Picks Thread relate to their local kick-off time and day.Congrats to our Pat Steward for being drummer of the year again at the BC Country Music Awards. Also big congrats to Cole Northey for once again making the video of the year with Aaron Pritchett.

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secure information flow for concurrency

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If I change my link to look like your link it works on my Mac but not on Android. This is on a Windows desktop. WebWorks of KC ranks very well locally in Kansas City and we get plenty of organic leads. This is a great article and something I will be implementing with my clients, thank you. I am not complaining in anyway Travis I just find it amusing and wish you all the very best.

Andy, are you referring to the guidelines that suggest consistent names across all properties. I have two options: 1) The above to Google Business. BTW: I tried the delete portion of the link edit but it did not work. I also tried yours. But again it did not work.

I then tried the unedited link on my mobile and it worked on Andriod.

secure information flow for concurrency

Not sure what the case is on iPhoneI checked it on the iphone. It worked but not the same. The user needs to scroll past Google Ads, the click on stars, the login then review. By this time she has dropped out. At least this is our experience. From all the research, it seems that newer Google My Business pages are the ones having the problems. Thanks for the update on this. Very useful in our latest round of email newsletters we have going out. Works great without any issues.

I followed your instructions for generating a direct link for mobile devices. It is showing the review now button for the I-phone but it is not working for the Android. The link for my client opened up the Google search page with the listing, but did not open the testimonials. The test was performed on Android. I will continue working with it. The best you can get is a link that asks user to open in browser or maps, and if they choose maps, then they can click on your business, scroll down and leave a review.

However when entered on mobile it will not open the window to review only the business search on Google. I would have lost faith in it due to endless Google updates but your link still works excellent. Your help is greatly appreciated. Was pretty pumped to see this article. Tried it right away, got my link. It works on desktop but not on the mobile. Is anyone else having this problem.I also attached the link you directed to my business url and it didnt work either.

When you create a QR code, it does not affect the original URL at all. You can take any URL and create a QR code, then use that QR code and at the same time, still use the original URL. What should I do.

At very least, their account is used for Analytics and Webmaster Tools integration. Google will ask you to log in before leaving a Google My Business reviewCopy the URL. This is the URL you will share with clients when asking them for a rating Need Help Creating Your 5-Star Review Link.

If you're having trouble creating your Google My Business review link, you can pay us to create your link. Shares Leave a Reply Cancel reply You have to agree to the comment policy.

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