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How to Use Computers (Privately!)
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Daniel Lew
May 03, 2025
Technology
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How to Use Computers (Privately!)
Talk given at MinneBar 19. No recording, sorry!
Daniel Lew
May 03, 2025
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Transcript
How to Use Computers Dan Lew & John Benningho f
(Privately!) https://www. fl ickr.com/photos/151691693@N02/40381366025
https://www. fl ickr.com/photos/12915906@N00/1326535625
Terminology Anonymity 🥸 Privacy 🔒 Security 🤝
Balancing Trade-O ff s High privacy Painful No privacy Easy
Threat Modeling From who? 👦 Protect what? How likely? 💯
Personal e ff ort? 🤷 Allies? 👩 Consequences? 💥
None
MAC Address 💻 🛜
https://www. fl ickr.com/photos/39160147@N03/14536074194
MAC Address Problem Solution MAC address ties your hardware to
a wi fi connection • Spoof MAC address • Don’t auto-connect to wi f
IP Address 🛜 🌐
https://www. fl ickr.com/photos/intelfreepress/6258625090/sizes/o/in/photostream/
IP Address Problem Solution ISP knows your IP address and
who you are! • Public wi fi • VPN • Tor
Software Detour VPN 👨💻 👩💻 👨💻 👩💻 🌐 • Hides
tra ff i c from ISP • …but not VPN! • Hides IP from 3rd party websites • Do not believe the ads! • Beware of free VPNs!
Software Detour Tor 👩💻 🌐 • Anonymizes IP address •
…and ONLY IP address! • Free • Study before using 🖥 🖥 🖥 🖥 🖥
Software https://commons.wikimedia.org/wiki/File:Programming_code.jpg
https://www. fl ickr.com/photos/10199641@N08/6454604459
Software Problem Solution Software can do whatever they want with
your data • Use vetted software • e.g. via EFF or Privacy Guides
None
Servers Problem Solution Servers gobble up as much data as
possible • Disable tracking when o ff ered • Use software designed for privacy
None
Malware Problem Solution Malicious software hates you! • Keep OS
updated • Enable built-in OS protections • Download from legit app stores
Online Identity
None
Surveillance Problem Solution Anyone between you and your recipient can
read your data • End-to-end encryption (E2EE)
Software Detour End-to-end encryption (E2EE) • Only you and recipient
can read the data • Beware mediocre E2EE or false claims! • Telegram bad • Signal good
https://www. fl ickr.com/photos/gageskidmore/54351608590/
Leaky Data Problem Solution Recipient can leak your content! •
Only message trusted recipients
https://www. fl ickr.com/photos/23487245@N08/5811736921
Data Breaches Problem Solution Data breaches happen constantly • Learn
to accept what you cannot change • Mitigate potential damage • Freeze credit • Number lock • Unique passwords
Software Detour Unique Passwords • Password managers • KeePassDX (free,
local) • Bitwarden, 1Password, etc. (paid, cloud) • Passkeys • Like a password manager, but more automatic • Ecocystem locked (for now)
None
Software Problem Solution People can piece together your story from
multiple sources • Think before posting • Delete old data / accounts
IRL https://www. fl ickr.com/photos/96437548@N00/5089938059
None
Printer Dots Problem Solution Printers are snitches! • Use old,
pre-dots printer • Analog printing (e.g. mimeograph)
https://www. fl ickr.com/photos/24484507@N00/7862855188
Loss Problem Solution People taking your devices • Encrypt device
• Stolen device protection • For protests / crossing borders… • Lock down devices • Leave devices at home
Links Thanks for listening! • https://www.privacyguides.org/ • https://ssd.e ff .org/
• https://inteltechniques.com/ danlew.net jbenningho ff .com