Sometimes we have files on our hard disks that we would like to remove for good. If you have set up full disk encryption when you installed Linux on your computer, you will have an encrypted hard disk which is pretty much useless to anyone without the password that only you know. However, sometimes, to … Continue reading How to shred a file on Linux leaving no remnants
Category: Risk
How to check if user name or ID has been compromised in a data breach
When data breaches occur, there are various kinds of data that get compromised. The most critical data that can get compromised is the user name or ID or the password. All is not lost due to a great service hosted by Troy Hunt. Use https://haveibeenpwned.com/ to check if the User name or user ID appears … Continue reading How to check if user name or ID has been compromised in a data breach
How to validate a short URL
At times, short URLs starting with https://bit.ly or https://goo.gl or any other short and strange form are received via SMS or even email. It is difficult to authenticate and know where these URLs point to. If the source is trusted, then too, it is important to know and validate these URLs to ensure they do … Continue reading How to validate a short URL
How to mitigate the threat of being a victim of ransom ware
Ransom ware seems to have gotten the better of many ordinary users. However, it is not a threat that has no mitigation measures available to the ordinary user, but is more of following good basic security and hygiene practices, to not fall prey to a ransom ware threat. Do the following: If you use Linux, … Continue reading How to mitigate the threat of being a victim of ransom ware
How to calculate MD5 or SHA256 sums in Linux and Android
Many of us use Linux Distributions like Ubuntu, Fedora, available for free on the Internet. To install these distributions on our computers, we need to down their ISO files. Recently, the Linux Mint ISO was hacked and malware inserted into some of it's files. It was then repacked and put up on an external website. … Continue reading How to calculate MD5 or SHA256 sums in Linux and Android
Error when creating Android Project in Eclipse IDE
android-sdks/build-tools/17.0.0/aapt: error while loading shared libraries: libz.so.1: cannot open shared object file: No such file or directory To fix the above error, open a terminal window and install:$ sudo apt-get install lib32z1 <enter>
Ubuntu Boot Manager Partition entry overwritten after Windows 8.1 patch update
I recently applied the latest Windows 8.1 patches. To my dismay, I found that the core Ubuntu 14.04 entries at boot time were missing and by default, the laptop always booted into Windows 8.1. This meant that my Ubuntu EFI boot partition had been corrupted or taken over by Windows 8.1 patches that probably updated … Continue reading Ubuntu Boot Manager Partition entry overwritten after Windows 8.1 patch update
Xiaomi or Xperia type security issues and how to detect them on any Android device
Anything that is too good to be true and available at dirt-cheap prices like the Xiaomi phones sold in flash sales on http://www.flipkart.com, always has a catch. It is like the Trojan horse. The security issue with Xiaomi phones is that the phone allegedly transmits user sensitive data like IMEI, contacts, numbers etc to servers … Continue reading Xiaomi or Xperia type security issues and how to detect them on any Android device
Keepass Droid password manager on Android
Today, many services have gone online. The ease and convenience of accessing these services online has led to a major issue for all users - that of remembering passwords to all the web sites to log in to access those services. Many users use diaries or books to write down user IDs and passwords and … Continue reading Keepass Droid password manager on Android
Web sites track users with invisible canvas fingerprint rather than cookies or flash cookies
There are several websites world over that track users. Originally, tracking mechanisms included Cookies, Flash Cookies. Historically too, I have written about Firefox add-ons in the articles below: Firefox add-ons you should never surf without Watching you silently – Flash Cookies / LSOs As mitigation measures were developed to counter cookies and flash cookies, old … Continue reading Web sites track users with invisible canvas fingerprint rather than cookies or flash cookies