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Microsoft Teams will soon block screen capture during meetings

bleepingcomputer.com

221–230 of 359 posts

Re: Microsoft Teams will soon block screen capture during meetings

#221

Sounds like only a matter of time until Microsoft adds this to Edge (and Chromium) and thenn any page can prevent you from taking a screenshot

This already exists in browsers. It's why you can't screenshot movies on youtube.com or netflix.com for example.

Part of that has to do with acceleration overlays, not DRM. You can often disable hardware acceleration and get your screenshot that way. Netflix is DRM though.

Re: Microsoft Teams will soon block screen capture during meetings

#222
post #13

This is just to serve as a reminder of who actually "owns" your computer. Overwhelmingly, people who speak in favor of windows, grew up using it. It's like the indoctrination of any religous cult, it works best when you start young. One has to wonder when the world will recover from windoze brain damage...

I was in favour of Windows until it reached a peak and then rapid decline.

MS was nowhere near as hostile towards its users in the past than it is now.

Re: Microsoft Teams will soon block screen capture during meetings

#223

Earlier quoted context omitted.

You don't need to elaborate on mechanisms for bypassing because you're already imagining a threat actor that is out of scope. This is primarily about blocking accidental leaks by regular employees who were asked to not record but ignored it. This kind of reuse of content happens all the time in companies of any significant size and isn't entirely stopped by simple requests or watermarks. This tool gives companies one…

And also gives legal teams more foundation to stand on, bypassing this isn't trivial so it shows real intent

"isn't trivial"? When the sibling comment mentions how a lot of employees will by default use a camera when asked for a screenshot?

Re: Microsoft Teams will soon block screen capture during meetings

#224
post #123

Earlier quoted context omitted.

But it’s literally the dumbest feature ever. There’s absolutely nothing preventing a user from pulling out their phone and taking a picture of any slide they want. Or having a camera recording the whole session out of view of their webcam. It is security theater at its peak.

It's not pure security theater, there are a few clear gains for those who care about such things: * Naive screencaps are much less traceable to the leaker than a naive photo is. Yes, someone can strip out EXIF data, but we've seen over and over again that they generally don't. And even without EXIF a naive framing on the photo is more likely to expose information about the location or identity of the person who took…

[flagged]

Re: Microsoft Teams will soon block screen capture during meetings

#225
post #123

Earlier quoted context omitted.

But it’s literally the dumbest feature ever. There’s absolutely nothing preventing a user from pulling out their phone and taking a picture of any slide they want. Or having a camera recording the whole session out of view of their webcam. It is security theater at its peak.

I’ve been on calls where a presenter explicitly asks that people not screenshot slides shown in the meeting because they’re drafts that will be refined and published or circulated later on. Some companies probably have that as a blanket policy. I’m sure this isn’t universally followed. This feature would help make that less likely to happen accidentally or “accidentally.” It wouldn’t stop deliberate leaks but that’s…

because they’re drafts that will be refined and published or circulated later on

A big DRAFT watermark tends to clarify that far more easily and obviously.

Re: Microsoft Teams will soon block screen capture during meetings

#227
I can see that some users (management?) would want this because they don't trust their people, but I bet Microsoft wants this to push Teams software on holdouts. I absolutely -hate- the download button for video conferencing (or any) apps that should just stay in the browser but you know they want full control of your device, and how much data they can send back.

Re: Microsoft Teams will soon block screen capture during meetings

#228

What's to stop me embedding a pinhole camera in the lamp behind me, zooming it in on the screen, and recording every meeting? These kinds of measures only stop the good guys from doing their jobs. The bad guys put way too much effort into espionage for this to work.

I love all the comments imagining complex technical workarounds while skipping right over the obvious workaround of using a smartphone camera to take a picture of the screen (which was mentioned near the top of the article that everyone read, of course). Modern camera phones are wide angle enough that it’s not hard to grab a shot of the monitor out of frame. > These kinds of measures only stop the good guys from doin…

I bet it streams the video like a protected HDMI movie... so the video stream isn't part of the WDDM's Team's Window - but placed on top of it.

Interestingly that can be overcome by moving the video just a little between two screens, which reverts it back to a WDDM surface. =D

Or TWO monitors, with "Duplicate" selected, and a camera recording the second monitor under the desk.

Re: Microsoft Teams will soon block screen capture during meetings

#229
post #191

Earlier quoted context omitted.

There are two kinds of people in the world, those who completely misunderstand the value of friction, and those who depend on friction too heavily; GP clearly falls into the former group. This feature provides value because it increases friction. It won't stop really determined and motivated users from leaking, but it'll make leaks, especially accidental leaks / those due to hacks, a lot less common. The same applies…

I work in security. I have had customers request this feature. I have asked them to do an anonymous survey of users to ask what action they would take if they were blocked from taking screenshots and users universally say they’d take a picture of their screen with their phone. I don’t underestimate friction, I just know even my grandma would reach for her camera for a picture of her screen and she doesn’t even know w…

Taking out a camera to make a picture is pretty noticeable in a meeting with few participants. The standard way to use a phone camera involves lifting it pretty close to your eye level. Other participants could literally shout to please stop photographing the screen. It will be also very visible who was trying to do so.

Yes, somebody who's clever enough would keep the camera away from view, and maybe would try several times first to hold it in a way that gives a good view of the screen, etc. But this is out of scope, it's a clear malicious intent, when we could expect much more sophisticated means.

Re: Microsoft Teams will soon block screen capture during meetings

#230

Earlier quoted context omitted.

> All these are due to laws and regulations that are there to protect the big companies and don’t take into consideration users This feature is not due to laws and regulations. The user in this case is the presenter who clicks the button to enable screenshot protection on their meeting. This is Microsoft trying to deliver a feature their users want , not laws and regulations making them do something their users don’t…

There isn’t a single user (presenter) that would ask something like this. Only a presenter that has to follow some strict “high security” procedures would enable something like this. A politician, for example, will have an excuse in case something leaks. The fact that with a simple mobile having a camera you can copy whatever is being presented (or with slightly more technical ways) is irrelevant for laws and procedu…

Every meeting I'm in where we talk numbers or strategy starts with someone saying, Please don't record or share this. The documents all say CONFIDENTIAL all over them. That's not true of all our presentations, just ones that we really wouldn't want our competition to see.

Many people still take screenshots of things they think are useful. Things still get shared though emails and occasionally posted on social media.

I have worked with various secure chamber VPN and VNC systems that make it quite difficult to record or screenshot. These are companies where their IP is worth billions of dollars and everyone wants a piece of it. It's difficult enough that it's not worth the effort to try and work around it. The rare time I really need something for debugging, I'll take a photo with my cameraphone, but it rarely comes to that.

Because it's that much harder, I record a lot less of it. Likewise for all the other engineers I work with. Friction won't stop it entirely, but it will make it far less frequent.

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