Most important (if not all) posts from this site are protected by a crypto-timestamp issued by the https://digistamp.com as the digital-timestamping authority.

You can verify the authenticity of the post when at the end of the post a link to download an archive (.zip, of .jar that is same as a zip file) containing a .pdf file containing a copy of the post as well as a doctimestamp.p7s file that was issued by the DigiStamp at the time the document (.pdf) was timestamped. For other posts containing video embedded from youtube.com, a different solution may exist where a second document containing a video screen-dump is used instead of the .pdf. This will also authenticate the youtube data as it exists exposed to the public at the moment of the time the blog was published.

To verify use the DigiStamp verification tool page here, you’ll need to expand the zip archive and extract the <article-name>.pdf and the doctimestamp.p7s file and upload them to the DigiStamp page. If the site verifies the content of the article you’ll see something like in the picture below.