Google Data Collection research (PDF) - by Professor Douglas C. Schmidt, Professor of Computer Science at Vanderbilt University, and his team. This study provides a unique and comprehensive view of Google’s data collection approaches and delves deeper into specific types of information it collects from users.

To understand what data Google collects, this study draws on four key sources:
a. Google’s My Activity and Takeout tools, which describe information collected during the use of Google’s
user-facing products;
b. Data intercepted as it issent to Google server domains while Google or 3rd-party products are used;
c. Google’s privacy policies (both general and product-specific); andd.Other 3rd-party researchthat has examined Google’s data collection efforts.

BookStack is a simple, self-hosted, easy-to-use platform for organising and storing information.

Cryptographic hash functions like SHA-1 are a cryptographer’s swiss army knife. You’ll find that hashes play a role in browser security, managing code repositories, or even just detecting duplicate files in storage. Hash functions compress large amounts of data into a small message digest. As a cryptographic requirement for wide-spread use, finding two messages that lead to the same digest should be computationally infeasible. Over time however, this requirement can fail due to attacks on the mathematical underpinnings of hash functions or to increases in computational power. Today, more than 20 years after of SHA-1 was first introduced, we are announcing the first practical technique for generating a collision. This represents the culmination of two years of research that sprung from a collaboration between the CWI Institute in Amsterdam and Google. We’ve summarized how we went about generating a collision below. As a proof of the attack, we are releasing two PDFs that have identical SHA-1 hashes but different content.

Stop sending .DOC files as mail attachments! There is a better way!

Adobe Reader is a huge system and reading PDFs is one of its many functions. If all you care is reading PFDs only then you should ditch it and get Sumatra or Foxit (Windows) or just use the document reader in your GNU/LInux distribution.