Notice to the W3C of EFF's appeal of the Director's decision on EME



  • Dear Tim, Jeff, and W3C colleagues

    On behalf of the Electronic Frontier Foundation, I would like to formally submit our request for an appeal of the Director’s decision to publish Encrypted Media Extensions as a W3C Recommendation, announced on 6 July 2017.

    The grounds for this appeal are that the question of a covenant to protect the activities that made DRM standardization a fit area for W3C activities was never put to the W3C membership. In the absence of a call for consensus on a covenant, it was improper for the Director to overrule the widespread members’ objections and declare EME fit to be published as a W3C Recommendation.

    The announcement of the Director’s decision enumerated three ways in which DRM standardization through the W3C – even without a covenant – was allegedly preferable to allowing DRM to proceed through informal industry agreements: the W3C’s DRM standard was said to be superior in its accessibility, its respect of user privacy, and its ability to level the playing field for new entrants to the market.

    However, in the absence of a covenant, none of these benefits can be realized. That is because laws like the implementations of Article 6 of the EUCD, Section 1201 of the US Digital Millennium Copyright Act, and Canada’s Bill C-11 prohibit otherwise lawful activity when it requires bypassing a DRM system.

    1. The enhanced privacy protection of a sandbox is only as good as the sandbox, so we need to be able to audit the sandbox.

    The privacy-protecting constraints the sandbox imposes on code only work if the constraints can’t be bypassed by malicious or defective software. Because security is a process, not a product and because there is no security through obscurity, the claimed benefits of EME’s sandbox require continuous, independent verification in the form of adversarial peer review by outside parties who do not face liability when they reveal defects in members’ products.

    This is the norm with every W3C recommendation: that security researchers are empowered to tell the truth about defects in implementations of our standards. EME is unique among all W3C standards past and present in that DRM laws confer upon W3C members the power to silence security researchers.

    EME is said to be respecting of user privacy on the basis of the integrity of its sandboxes. A covenant is absolutely essential to ensuring that integrity.

    2. The accessibility considerations of EME omits any consideration of the automated generation of accessibility metadata, and without this, EME’s accessibility benefits are constrained to the detriment of people with disabilities.

    It’s true that EME goes further than other DRM systems in making space available for the addition of metadata that helps people with disabilities use video. However, as EME is intended to restrict the usage and playback of video at web-scale, we must also ask ourselves how metadata that fills that available space will be generated.

    For example, EME’s metadata channels could be used to embed warnings about upcoming strobe effects in video, which may trigger photosensitive epileptic seizures. Applying such a filter to (say) the entire corpus of videos available to Netflix subscribers who rely on EME to watch their movies would safeguard people with epilepsy from risks ranging from discomfort to severe physical harm.

    There is no practical way in which a group of people concerned for those with photosensitive epilepsy could screen all those Netflix videos and annotate them with strobe warnings, or generate them on the fly as video is streamed. By contrast, such a feat could be accomplished with a trivial amount of code. For this code to act on EME-locked videos, EME’s restrictions would have to be bypassed.

    It is legal to perform this kind of automated accessibility analysis on all the other media and transports that the W3C has ever standardized. Thus the traditional scope of accessibility compliance in a W3C standard – “is there somewhere to put the accessibility data when you have it?” – is insufficient here. We must also ask, “Has W3C taken steps to ensure that the generation of accessibility data is not imperiled by its standard?”

    There are many kinds of accessibility metadata that could be applied to EME-restricted videos: subtitles, descriptive tracks, translations. The demand for, and utility of, such data far outstrips our whole species’ ability to generate it by hand. Even if we all labored for all our days to annotate the videos EME restricts, we would but scratch the surface.

    However, in the presence of a covenant, software can do this repetitive work for us, without much expense or effort.

    3. The benefits of interoperability can only be realized if implementers are shielded from liability for legitimate activities.

    EME only works to render video with the addition of a nonstandard, proprietary component called a Content Decryption Module (CDM). CDM licenses are only available to those who promise not to engage in lawful conduct that incumbents in the market dislike.

    For a new market entrant to be competitive, it generally has to offer a new kind of product or service, a novel offering that overcomes the natural disadvantages that come from being an unknown upstart. For example, Apple was able to enter the music industry by engaging in lawful activity that other members of the industry had foresworn. Likewise Netflix still routinely engages in conduct (mailing out DVDs) that DRM advocates deplore, but are powerless to stop, because it is lawful. The entire cable industry – including Comcast – owes its existence to the willingness of new market entrants to break with the existing boundaries of “polite behavior.”

    EME’s existence turns on the assertion that premium video playback is essential to the success of any web player. It follows that new players will need premium video playback to succeed – but new players have never successfully entered a market by advertising a product that is “just like the ones everyone else has, but from someone you’ve never heard of.”

    The W3C should not make standards that empower participants to break interoperability. By doing so, EME violates the norm set by every other W3C standard, past and present.

    Through this appeal, we ask that the membership be formally polled on this question: “Should a covenant protecting EME’s users and investigators against anti-circumvention regulation be negotiated before EME is made a Recommendation?”

    Thank you. We look forward to your guidance on how to proceed with this appeal.

    https://www.eff.org/deeplinks/2017/07/notice-w3c-effs-appeal-directors-decision-eme


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Tmux Commands

screen and tmux

A comparison of the features (or more-so just a table of notes for accessing some of those features) for GNU screen and BSD-licensed tmux.

The formatting here is simple enough to understand (I would hope). ^ means ctrl+, so ^x is ctrl+x. M- means meta (generally left-alt or escape)+, so M-x is left-alt+x

It should be noted that this is no where near a full feature-set of either group. This - being a cheat-sheet - is just to point out the most very basic features to get you on the road.

Trust the developers and manpage writers more than me. This document is originally from 2009 when tmux was still new - since then both of these programs have had many updates and features added (not all of which have been dutifully noted here).

Action tmux screen
start a new session tmux OR
tmux new OR
tmux new-session
screen
re-attach a detached session tmux attach OR
tmux attach-session
screen-r
re-attach an attached session (detaching it from elsewhere) tmux attach -d OR
tmux attach-session -d
screen -dr
re-attach an attached session (keeping it attached elsewhere) tmux attach OR
tmux attach-session
screen -x
detach from currently attached session ^b d OR
^b :detach
^a ^d OR
^a :detach
rename-window to newname ^b , <newname> OR
^b :rename-window <newn>
^a A <newname>
list windows ^b w ^a w
list windows in chooseable menu ^a "
go to window # ^b # ^a #
go to last-active window ^b l ^a ^a
go to next window ^b n ^a n
go to previous window ^b p ^a p
see keybindings ^b ? ^a ?
list sessions ^b s OR
tmux ls OR
tmux list-sessions
screen -ls
toggle visual bell ^a ^g
create another window ^b c ^a c
exit current shell/window ^d ^d
split window/pane horizontally ^b " ^a S
split window/pane vertically ^b % ^a |
switch to other pane ^b o ^a <tab>
kill the current pane ^b x OR (logout/^D)
collapse the current pane/split (but leave processes running) ^a X
cycle location of panes ^b ^o
swap current pane with previous ^b {
swap current pane with next ^b }
show time ^b t
show numeric values of panes ^b q
toggle zoom-state of current pane (maximize/return current pane) ^b z
break the current pane out of its window (to form new window) ^b !
re-arrange current panels within same window (different layouts) ^b [space]
Kill the current window (and all panes within) ^b killw [target-window]
  • Criteo is an ad company. You may not have heard of them, but they do retargeting, the type of ads that pursue users across the web, beseeching them to purchase a product they once viewed or have already bought. To identify users across websites, Criteo relies on cross-site tracking using cookies and other methods to follow users as they browse. This has led them to try and circumvent the privacy features in Apple’s Safari browser which protects its users from such tracking. Despite this apparently antagonistic attitude towards user privacy, Criteo has also been whitelisted by the Acceptable Ads initiative. This means that their ads are unblocked by popular adblockers such as Adblock and Adblock Plus. Criteo pays Eyeo, the operator of Acceptable Ads, for this whitelisting and must comply with their format requirements. But this also means they can track any user of these adblockers who has not disabled Acceptable Ads, even if they have installed privacy tools such as EasyPrivacy with the intention of protecting themselves. EFF is concerned about Criteo’s continued anti-privacy actions and their continued inclusion in Acceptable Ads.

    Safari Shuts out Third Party Cookies…

    All popular browsers give users control over who gets to set cookies, but Safari is the only one that blocks third-party cookies (those set by a domain other than the site you are visiting) by default. (Safari’s choice is important because only 5-10% of users ever change default settings in software.) Criteo relies on third-party cookies. Since users have little reason to visit Criteo’s own website, the company gets its cookies onto users’ machines through its integration on many online retail websites. Safari’s cookie blocking is a major problem for Criteo, especially given the large and lucrative nature of iPhone’s user base. Rather than accept this, Criteo has repeatedly implemented ways to defeat Safari’s privacy protections.

    One workaround researchers detected Criteo using was to redirect users from sites where their service was present to their own. For example, if you visited wintercoats.com and clicked on a product category, you would be first diverted to criteo.com and then redirected to wintercoats.com/down-filled. Although imperceptible to the user, this detour was enough to persuade the browser that criteo.com is a site you chose to visit, and therefore a first party entitled to set a cookie rather than a third party. Criteo applied for a patent on this method in August 2013.

    …And Closes the Backdoor

    Last summer, however, Apple unveiled a new version of Safari with more sophisticated cookie handling—called Intelligent Tracking Prevention (ITP)—which killed off the redirect technique as a means to circumvent the cookie controls. The browser now analyzes if the user has engaged with a website in a meaningful way before allowing it to set a cookie. The announcement triggered panic among advertising companies, whose trade association, the Interactive Advertising Bureau, denounced the feature and rushed out technical recommendations to work around it. Obviously the level of user “interaction” with Criteo during the redirect described above fails ITP’s test, which meant Criteo was locked out again.

    It appears that Criteo’s response was to abandon cookies for Safari users and to generate a persistent identifier by piggybacking on a key user safety technology called HSTS. When a browser connects to a site via HTTPS (i.e. a site that supports encryption), the site can respond with an HTTP Strict Transport Security policy (HSTS), instructing the browser to only contact it using HTTPS. Without a HSTS policy, your browser might try to connect to the site over regular old unencrypted HTTP in the future—and thus be vulnerable to a downgrade attack. Criteo used HSTS to sneak data into the browser cache to produce an identifier it could use to recognize the individual’s browser and profile them. This approach relied on the fact that it is difficult to clear HSTS data in Safari, requiring the user to purge the cache entirely to delete the identifier. For EFF, it is especially worrisome that Criteo used a technique that pits privacy protection against user security interests by targeting HSTS. Use of this mechanism was documented by Gotham City Research, an investment firm who have bet against Criteo’s stock.

    In early December, Apple released an update to iOS and Safari which disabled Criteo’s ability to exploit HSTS. This led to Criteo revising down their revenue forecasts and a sharp fall in their share price.

    How is Criteo Acceptable Advertising”****?

    "… w__e sort of seek the consent of users, just like we had done before_."__1_ - Erich Eichmann, CEO Criteo

    _"Only users who don’t already have a Criteo identifier will see the header or footer, and it is displayed only once per device. Thanks to [the?] Criteo advertisers network, most of your users would have already accepted our services on the website of another of our partner. On average, only 5% of your users will see the headers or footers, and for those who do, the typical opt-out rate is less than .2%._" - Criteo Support Center

    Criteo styles itself as a leader in privacy practices, yet they have dedicated significant engineering resources to circumventing privacy tools. They claim to have obtained user consent to tracking based on a minimal warning delivered in what we believe to be a highly confusing context. When a user first visits a site containing Criteo’s script, they received a small notice stating, _"_Click any link to use Criteo’s cross-site tracking technology." If the user continues to use the site, they are deemed to have consented. Little wonder that Criteo can boast of a low opt-out rate to their clients.

    Due to their observed behaviour prior to the ITP episode, Criteo’s incorporation into the Acceptable Ads in December 2015 aroused criticism among users of ad blockers. We have written elsewhere about how Acceptable Ads creates a clash of interests between adblocking companies and their users, especially those concerned with their privacy. But Criteo’s participation in Acceptable Ads brings into focus the substantive problem with the program itself. The criteria for Acceptable Ads are concerned chiefly with format and aesthetic aspects (e.g. How big is the ad? How visually intrusive? Does it blink?) and excludes privacy concerns. Retargeting is unpopular and mocked by users, in part because it wears its creepy tracking practices on its sleeve. Our view is that Criteo’s bad behavior should exclude its products from being deemed “acceptable” in any way.

    The fact that the Acceptable Ads Initiative has approved Criteo’s user-tracking-by-misusing-security-features ads is indicative of the privacy problems we believe to be at the heart of the Acceptable Ads program. In March this year, Eyeo announced an Acceptable Ads Committee that will control the criteria for Acceptable Ads in the future. The Committee should start by instituting a rule which excludes companies that circumvent explicit privacy tools or exploit user security technologies for the purpose of tracking.

    1. http://criteo.investorroom.com/download/Transcript_Q3+2017+Earnings_EDITED.pdf

    https://www.eff.org/deeplinks/2017/12/arms-race-against-trackers-safari-leads-criteo-30

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  • Have you ever sent a motivational text to a friend? If you have, perhaps you tailored your message to an activity or location by saying “Good luck in the race!” or “Have fun in New York!” Now, imagine doing this automatically with a compuuuter. What a great invention. Actually, no. That’s not a good invention, it’s our latest Stupid Patent of the Month.

    U.S. Patent No. 9,069,648 is titled “Systems and methods for delivering activity based suggestive (ABS) messages.” The patent describes sending “motivational messages,” based “on the current or anticipated activity of the user,” to a “personal electronic device.” The patent provides examples such as sending the message “don’t give up” when the user is running up a hill. The examples aren’t limited to health or exercise. For example, the patent suggests sending messages like “do not fear” and “God is with you” when a “user enters a dangerous neighborhood.”

    The patent’s description of its invention is filled with silly, non-standard acronyms like ABS for “activity based suggestive” messages or EBIF for “electronic based intelligence function.” These silly acronyms create an illusion of complexity where plain, descriptive language would reveal the mundane nature of the supposed invention. For example, what the patent grandly calls EBIF appears to be nothing more than standard computer processing.

    The ’648 patent is owned by Motivational Health Messaging LLC. While this may be a new company, at least one of the people behind it has been involved in massive patent trolling campaigns before. And the two named inventors have both been inventors on patents that trolls have asserted hundreds of times. One is also an inventor listed on patents asserted by infamous patent troll Shipping and Transit LLC. The other named inventor is the inventor on the patents asserted by Electronic Communication Technologies LLC. Those two entities (with their predecessors) brought over 700 lawsuits, many against very small businesses. In other words, the ’648 patent has been issued to Troll Co. at 1 Troll Street, Troll Town, Trollida USA.

    We believe that the claims of the ’648 patent are clearly invalid under the Supreme Court’s decision in Alice v. CLS Bank, which held abstract ideas do not become eligible for a patent merely because they are implemented in conventional computer technology. Indeed, the patent repeatedly emphasizes that the claimed methods are not tied to any particular hardware or software. For example, it states:

    The software and software logic described in this document … which comprises an ordered listing of executable instructions for implementing logical functions, can be embodied in any non-transitory computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions.

    The ’648 patent issued on June 30, 2015, a full year after the Supreme Court’s Alice ruling. Despite this, the patent examiner never even discussed the decision. If Alice is to mean anything at all, it has to be applied to an application like this one.

    In our view, if Motivational Health Messaging asserts its patent in court, any defendant that fought back should prevail under Alice. Indeed, we would hope that the court would strongly consider awarding attorney’s fees to the defendant in such a case. Shipping & Transit has now had two fee awards made against it for asserting patents that are clearly invalid under Alice. And the Federal Circuit recently held that fee awards can be appropriate when patent owners make objectively unreasonable argument concerning Alice.

    In addition to the problems under Alice, we believe the claims of the ’648 patent should have been rejected as obvious. When the application was filed in 2012, there was nothing new about sending motivational messages or automatically tailoring messages to things like location. In one proposed embodiment, the patent suggests that a “user walking to a hole may be delivered ABS messages, including reminders or instructions on how to play a particular hole.” But golf apps were already doing this. The Patent Office didn’t consider any real-world mobile phone applications when reviewing the application.

    If you want to look for prior art yourself, Unified Patents is running a crowdsourcing contest to find the best prior art to invalidate the ’648 patent. Aside from the warm feelings that come from fighting patent trolls, there is a $2000 prize pool.

    Despite the weakness of its patent, Motivational Health Messaging LLC might still send out demand letters. If you receive such a letter, you can contact EFF and we can help you find counsel.

    We have long complained that the Patent Office promotes patent trolling by granting obvious and/or abstract software patents. The history of the ’648 patent shows how the Patent Office’s failure to properly review applications leads to bad patents falling into the hands of trolls.

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