If you collect enough information on people, they can be manipulated to certain beliefs or actions. This is the same information that Facebook and Google use for advertising purposes, similar information to the Cambridge Analytica events, and the risk is China (or a nefarious actor with this information) using it to "meddle" within the US.
Apps collecting sensitive information (which maybe TikTok content counts as?) can also be used for blackmail, especially when owned by a foreign government which wouldn't even blink at blackmail.
There are other more paranoia-centered concerns around essentially-real-time location data being used to "know where in the country to attack".
Basically there are definitely legitimate concerns around large-scale data collection, but the "National Security" concern definitely seems to be "China is less trustworthy than any American company".
This is just my understanding, and am open to being proven wrong here.
Update:
I forgot to mention that I do believe there is a legitimate concern around a foreign government having what is effectively editorial control over a platform which is used by a rather-easily-influenced group as a "news source". Whether or not social media should ever be considered a source of news is a different discussion, but if a large section of the US population is believing what they see on TikTok as fact, and the content on TikTok is editorialized by a foreign state actor, it is a legitimate concern.
Meanwhile it's not the government, but Instagram hides unfavorable "related hashtags" when you search for Trump-related hashtags, but doesn't do the same for Biden: https://www.buzzfeednews.com/article/ryanmac/instagram-relat...
Viva la democracia! /s
I would expect the big IT companies to be treated more and more as intelligence assets over time, if we aren't already there.
This sort of erosion of due process and international law serves the current administration well (government by fiat is now the norm), but I don't think it serves the US itself well at all. We're about to discover just how resistant the US republic is to such attacks on free speech and the rule of law.
This has already happened? It’s weird to have these conversations as if the Snowden revelations don’t exist.
In the future? Who knows what might happen if this sets a precedent. Seems like a slippery slope to me if the US government is allowed to just selectively ban communication channels on the grounds of "security".
It's been 10+ years of these companies and no meaningful oversight has been exerted, at least not on behalf of users. Not after:
1. Self-admitted election interference https://www.vox.com/2017/4/28/15476142/facebook-report-trump...
2. Tracking and targeting individuals' political speech in the US https://www.theverge.com/2019/8/31/20837448/social-media-dhs...
3. Tracking and targeting individuals' political speech in autocratic nations: https://www.npr.org/2019/11/07/777352750/how-saudi-arabia-us...
4. Paid to suggest pro-CCP propaganda! https://www.nytimes.com/2017/11/08/technology/china-facebook...
You mean what's happening everyday on Facebook and Twitter often being instigated by Chinese and Russian actors?
[1]https://www.theatlantic.com/ideas/archive/2018/07/the-us-has...
Sure, and I totally understand if those other countries decide to take steps to prevent that interference from happening. It is perfectly reasonable for them to want to do so, just like it is for the US.
But I think it's primarily just deserved reciprocity to how the CCP is behaving in general. The US and the west have bent over backward for like 30 years and all we got was just more totalitarianism, hacking, IP theft, etc. Why play?
https://www.nytimes.com/2020/08/18/opinion/tiktok-wechat-ban...
TikTok and WeChat benefit from being the only social networks that can be accessed from all of the largest internet markets in the world. And the only social networks that can do that are... the ones from China. When the US is permissive, and China is not, China gets to write all the rules.
This gives China the ability to effectively export their restrictions on speech around the world, as they have shown an eagerness to do. If you want to be a global social network, you have to play by China's rules, globally.
I'm not personally convinced that banning these platforms is the right move, but I think the case is legitimate, and it's certainly a major problem.
It's bad enough that the Chinese market is already a bubble (foreign companies need a Chinese partnership to enter), yet the Chinese companies can freely operate in the western world.
That is true in many areas. The questions is what a liberal democracy should do.
A lot more data is exported to china through the cheap IP cameras.
Facebook and Google does tracking, but I can post as much anti-Trump material as I want. Try putting anti Xi material on WeChat and see what happens.
Remember that this all started when a bunch a kids used TikTok to play a prank and sank a Trump rally: https://www.nytimes.com/2020/06/21/style/tiktok-trump-rally-...
Also, if you think banning a chat app is more of a government restriction on free speech than requiring filmmakers to censor their movies and require Chinese government minders to be on the set in order to be screened in China then I would disagree with you.