Sunday, February 23, 2020

Cybersecurity Tips


* Stop and Think.

* Don't click. Copy and paste a link into web browser.

* Research first.

* Lock your computer, cellphone when you're away.

* Backup before make any change, on daily, and weekly.

* Using KeePass or KeePassXC on Mac for password manager.

* 7-Zip or Keka for macOS file archiver

* Write it down. Pen and paper are good.

* Email with plain text mode.

* Airplane mode if not in use.

* Power off if not in use.

* Install only necessary app.

* Uninstall if no longer need.

* Use CerUtil or gpg to verify the integrity of downloaded file.

Before installing, you should always verify that your download matches

the signature that is published alongside the release package!

* Use Two-Factor Authentication (2FA) if provide.

* Keep it simple.

Tuesday, February 11, 2020

How to verify checksum of a downloaded file on MacOS

$ openssl dgst -sha256 VirtualBox-6.1.2-135662-OSX.dmg



$ openssl dgst -sha256 Oracle_VM_VirtualBox_Extension_Pack-6.1.2.vbox-extpack



Compare result with value in


How to recognize a fake Geek Squad renewal scam | Consumer Advice

Except from Scammers are at it ag...