Stanford Seminar - IPFS and the Permanent Web
Looked in Neo and IOTA, and tried to develop on neo. Both of them are currently updating the main net.
Based on what I experienced, I thought Neo is live. If you want to develop something on public chain, neo is a good choice, sdk is really comprehensive, and client library's developers are pretty interactive. We had a good conversation and all of my issues are managed to get fixed or have work around.
However the gas fee is a little bit tricky. Gas is generated by new blocks, which new gas is distributed based on how much neo you hold. And gas itself is not reusable. Thus deploying and invoking contract might be a challenge.
Iota in the other hand, is more like a dream. Although it is not that mature now, but from the paper, it's design is really attractive and I call that the future of blockchain. No miner, no fee, though you have to pay fee to run smart contract. But it's more open to new developers since it doesn't require that much money to start with (considering the current price of neo coin). And it officially encourage user to set up their own chain to discover new possibilities.
Another unofficial news is Chinese government start to act to miners(Arrested a miner and force him to hand in his crypto assets, but not sure why). It's not confirmed though, but I don't think a single government can takedown a blockchain. They certainly not understand what is cryptocurrency and public blockchain.
「如果无政府主义者希望反专制的黑客行动能够发生,那么我们的运动就需要自己学习这些技能,并以技术和政治上的理解帮助传递给其他人。」
@KirisameUkiyo
https://www.iyouport.org/%E9%9D%A9%E5%91%BD%E6%96%97%E4%BA%89%E4%B8%AD%E9%BB%91%E5%AE%A2%E7%9A%84%E5%8A%9B%E9%87%8F%E5%92%8C%E6%BD%9C%E5%8A%9B%EF%BC%8C%E4%BB%A5%E5%8F%8A%E4%B8%80%E4%BA%9B%E8%B5%84%E6%BA%90/
网络晒照的隐私顾虑(仅技术方面,事实上你拍的照片里的每个角落都有可能泄露你的真实位置,所以我从来不网络晒照)
通过很多相机拍摄的照片文件都会包含照片内容之外的信息,包括相机型号、曝光时间、光圈大小等拍摄的技术细节,和拍摄地点的GPS坐标等隐私信息。这些信息名为为Exif Tag,属于元数据中的一类。
Exif信息同样存在于视频和音频文件中。
大多数社交网站在发布图片时会采取压缩等方法来减少服务器的存储与网络传输成本,而exif信息会在公开发布的版本中被消去。但是仍然有部分网站会直接上传图片文件,而造成拍摄者隐私泄露。比如,1月初,黑客在爬取了另类右翼社交网站Parler的所有帖子和文件之后,惊奇地发现他们存着的所有照片都原封不动地包含着原始的相机型号、光圈、gps坐标等exif tag,于是这些信息便可以被用于追踪用户的行踪。
通过在常见的fedi社交平台实验性上传包含一定exif tag数据的,本人发现常见的fedi平台中,Mastodon和Pleroma都会自动压缩图片,并抛弃图片中的Exif信息。而Misskey,由于图片采用与文件相同的方式上传,exif信息将被随图片上传至服务器并发布。如果需要上传拍摄的图片的话,Misskey用户可能需要额外小心。
如何清理照片/视频中的元数据?
1. Windows/Linux/MacOS
计算机苦手?(Y/N)_
如果你对计算机不是很懂的话,可以使用ExifCleaner( https://exifcleaner.com/ )。你只需要拖拽待清理的文件到窗口中即可。
如果你认为你对计算机比较了解,可以尝试使用MAT2( https://0xacab.org/jvoisin/mat2 ),它是一个命令行工具,支持更多文件种类的元数据清理(包括office文档等)。
2.Android
你可以安装Scrambled Exif应用来清除图片和视频中的元数据。只需要在分享菜单中选择Scrambled Exif即可。如果你需要将清除完毕的图片保存以待后用,可以安装Bridge应用(搜索: moe.shizuku.bridge )将其保存到本地。
*Scrambled Exif可以从Fdroid下载安装,访问:
https://f-droid.org/packages/com.jarsilio.android.scrambledeggsif
3.iOS
因为本人不怎么用iOS设备,所以不是很了解,也无法推荐应用,非常抱歉,请看下一节。
4.Web
MAT2开发者同时开发了一个基于Web程序的MAT2版本:MAT2Web。你可以将文件上传到MAT2Web,然后在清理完毕后下载清理好的文件。
演示实例:
https://matweb.info/
#privacy #exif #metadata #selfie #social
Abandoned since this instance is broken. Please follow my new account: @skyblond