On #WorldBackupDay, a reminder of the 3-2-1 Rule:

• 3 copies of each file exist, as a minimum
• 2 copies are on physically different storage media
• 1 copy is on a storage medium that is physically located “elsewhere”

As an absolute minimum, suggest the following to people without appropriate protection:

• Get 2 external disks
• Make regular backups on one of them, while the other remains stored “elsewhere”, with someone trustworthy
• Have the two disks swap places regularly

Strictly speaking, the “1” of the 3-2-1 rule is only maintained if you take the disk that has just been used for the backup to “elsewhere”, and return with the other one (not the other way round).

For secure data backup, here’s how to do the 3-2-1 rule right

"The venerable 3-2-1 rule for backing up data remains a tried-and-true method for ensuring the integrity of copied data that is essential to disaster recovery efforts, but it has to be done properly."
W. Curtis Preston

https://www.networkworld.com/article/968388/for-secure-data-backup-here-s-how-to-do-the-3-2-1-rule-right.html

Good morning, humans of #defcon31! It's good to be together again.

Please remember to drink water and look out for each other.

Let's have fun out there!

Good morning, #DEFCON31! Please remember to stay hydrated, well-rested and curious. Meet some new humans, try some new things. Let’s make this amazing!

You.

What’s true during DEF CON is true year round.