Safe Computing and Internet Browsing with Free Software

Aosheng Wang (王敖生 )2014-07-19

Summary

• Password• Encryption• Backup• Antivirus• Safe Internet Browsing• Virtual Machine

PasswordPlease enter your new password:"cabbage"

Sorry, the password must be more than 8 characters."boiled cabbage"

Sorry, the password must contain 1 numerical character."1 boiled cabbage"

Sorry, the password cannot have blank spaces."50bloodyboiledcabbages"

Sorry, the password must contain at least one upper case character."50BLOODYboiledcabbages"

Sorry, the password cannot use more than one upper case character consecutively."50BloodyBoiledCabbagesShovedUpYourYouKnowWhat,IfYouDon'tGiveMeAccessnow”

Sorry, the password cannot contain punctuation.“ReallyPissedOff50BloodyBoiledCabbagesShovedUpYourYouKnowWhatIfYouDontGiveMeAccessnow”

Sorry, that password is already in use.

KeePass

• Password management– Usernames and passwords– Custom fields and free-form notes– File attachment– Encrypted database– Single master password and/or key file– Small and simple to use

• Free, open source, and cross-platform

Encryption

NSA: If Your Data Is Encrypted, You Might Be Evil.

TrueCrypt• On-the-fly encryption of a container file

– Mounted as a virtual encrypted disk• Free, open source, and cross-platform• Publicly audited

– No backdoor found for decryption• Widely used

– Private companies– Public institutions– Governments?

• Commercial encryption software in US– Decryption backdoor may be required by NSA

• Recommended by Snowden• Sudden shut-down of TrueCrypt development in May 2014

– A new Internet home in Switzerland– Safe to use the latest version (7.1a) released before the shut-down

Backup

• Two types of people– those who have lost data, and – those who are going to lose data.

• Other two kinds of people– those who backup their data, and – those who have never had a hard drive crash.

• Two types of backup– File backup– System backup

FreeFileSync for File Backup

• Folder comparison and synchronization• Free, open source, and cross-platform• Easy to use

Antivirus, Antimalware, and Safe Internet Browsing

• Virus and antivirus• Malware and antimalware• Identity theft• Email Hacking, Hijacking, Spamming• Microsoft Security Essentials (WinXP, Win7)• Windows Defender (Win8)• Virtual machine

Virtual Machine

• Software-based emulation of a computer– Guest OS Running in a host OS– Independent of software running in the host

• Preventive health care for home computers– Running legacy or risky software in virtual

machine– Safe Internet browsing in virtual machine

VirtualBox

• Virtual machine software from Oracle• Free, open source, and cross-platform• License key of guest OS– Do not throw away the key from your old PCs– Microsoft provides 90-day VirtualBox-ready OS

• Virtually no limit to use forever

– Free open source OS• Linux• Android

– Mac in Windows and Windows in Mac

Links

• KeePass– http://keepass.info/

• TrueCrypt– https://truecrypt.ch/

• FreeFileSync– http://freefilesync.sourceforge.net/usage.php

• Security Essentials– http://

windows.microsoft.com/en-us/windows/security-essentials-download

• VirtualBox– https://www.virtualbox.org/

Demo