天空вℓσи∂ [Deprecated edition] @skyblond@social.cleverlibre.org

@Candinya 关错了就比删错了好（

@Candinya 可以参考scp基金会en总站的注册方式，他们是把注册用的暗号混杂在一大段规则里，你不看完就不知道注册暗语填什么（

@Candinya 我继续查了查，看起来除了有新开账户被拒的，还有老客户突然被封号的。这多少有些吓人了，虽然他们家是真便宜，可是动不动就随意封号，为了备份而付出额外的代价就不值得了。

我过几天看看也准备迁出hetzner了

（看来他们不是歧视中国人，他们是歧视所有人，我看到reddit上被封号的有美国人，印尼人，欧洲人。这样的公司真是活久见）

@Candinya 嘛，我又查了一下，看起来hetzner验证的通过率一直有问题，我看到reddit上也有不少外国人骂街

@Candinya 不是OVHCloud嘛，我记得他们很早以前就不接受中国客户了

@Candinya 我这边用hetzner的体验倒是还挺好的，认证也很顺利，找客服反馈issue也还不错。我看网上说用paypal作为付款方式会提高成功率，如果注册之后直接paypal充一点credit的话成功率会更高。但我之前是用信用卡注册的，不清楚现在的行情。

至于歧视，我觉得看看Oracle就知道国内这些白嫖客有多狠了，信用卡验证都拦不住。像是OVH这些直接都不接待中国客户，就没办法

@Candinya 那很奇怪诶，建议找客服对线（

LSB steganography is fairly easy. I can embed 70KB of information into a 768x768 image. But this method is extremely fragile. The channel must preserve all the original colors, otherwise the message is lost.

DFT steganography is kind of amazing. Once you put something visual on the freq space, your eyes can still recognize the pattern even if the image is corrupted heavily. But a visual pattern is not very useful in transmitting information. You can't even put a QR code in the freq space (technically you can, but the original file will be heavily disrupted.)

Can someone explain to me how to embed info into a picture using 2d DFT?

Now I can turn the picture into a Complex matrix, but I failed to find a way to encode info into that complex matrix.

A lot of material said "in theory" you can put binary data in it, but eventually they just use a simple logo for demo.

(Also, I spend several hours with ChatGPT to figure out what the physical meaning of 2d DFT and how to do it, and why I have to pad zero to the image)

@trinsec Yes, all I have is 2 fans

@Candinya 我觉得欧洲那些服务商还都挺可信的，毕竟有GDPR，而且像是账单之类的东西，有时候用假名不太好处理一些麻烦，尤其是和法律资料对不上的时候。

谷歌和苹果那边我也用的是假名（

但是有一次IBM云我用的真名，先给我通过KYC了，用了一个月又给我封了，连数据也不给我取回（当然也没收钱），就很脑瘫

Oh man, the suffering summer. I like summer, but I hate the heat.

Both my laptop and myself are struggling.

I hate XML so much that I didn't want to keep implementing the webdav server.

And my laptop is struggling with the temperature. The room temperature is 33C with no air conditioning, and I have to limit the CPU clock to 1.6GHz to prevent overheating and thermal throttling. And my IDEA is just unresponsive in such a low freq, without mentioning 39 chrome tabs running in the background.