Blog

News from Riddler. We publish when there is something to say.

  1. Documents you can prove

    A signed PDF has to stand on its own. Why Riddler built Sigil around verification, not only the click.

  2. Sigil certifies, Praxis orchestrates

    Riddler’s two products, in one sentence each, and why they exist together.

  3. The site, again

    riddler.com.ar is published again. The public work is Sigil and Praxis; the site now says so.