Online Security


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Being safe online

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Online Security

  1. 1. Being safe onlineSanjana HattotuwaTED FellowArchitect and co-curator, Groundviews
  2. 2. There is no absolute security
  3. 3. Security is a shared responsibility
  4. 4. Security is only asgood as weakest link
  5. 5. How the Internet works
  6. 6. Layers of the internet
  7. 7. Compromise on every level Spyware, malware, keyloggers Man in the middle attacks ISPs, GSM location info
  8. 8. Tracking (harmlessly?)
  9. 9. Passwords & posts
  10. 10. Creating a strong password• I was born on 9th April 1977 in Colombo• Iwbo9A1977iC• Why are you sad today?• WrU:-(2d?• My advice – at least 10 alpha-numeric and ASCII characters• If on public PC, try to copy and paste passwords online. NEVER type them in.
  11. 11. Common-sense posting• Know the laws in your country pertaining to liability, libel etc.• When signing up for a blog account where you will be publishing sensitive content, do not use you personal email address or information• In your blog posts and profile page, do not post pictures of yourself or friends• Do not use your real name and do not give personal details• Schedule posts: Blog platforms like Wordpress allow uses to automatically publish a post on a designated date and time.
  12. 12. Common-sense posting• On social networks, create one account for activism under a false but real-sounding name (so your account won’t be deleted) but don’t tell your friends about it.• Information on Facebook, stays on Facebook. Be careful what you upload and say.• Never join a sensitive group with your real account. Use your fake account to join activism groups.• Don’t use paid services. Your credit card can be linked back to you.
  13. 13. Choosing a web browser
  14. 14. Internet Explorer 9
  15. 15. Firefox 12 and Mobile
  16. 16. Chrome 19
  17. 17. Browsing without a trace
  18. 18. Private browsing in IE 9
  19. 19. Private browsing in Firefox
  20. 20. Incognito browsing in Chrome
  21. 21. Google’s own protection
  22. 22. Google’s own protection
  23. 23. EFF’s HTTPS Everywhere
  24. 24. DNSCrypt (OS X only)
  25. 25. Email
  26. 26. •• Spam and phishing protection• Built for Gmail and easy to set up• Thunderbird warns you when you click on a link which appears to be taking you to a different Web site than the one indicated by the URL in the message.
  27. 27. Safe & best email practices• Use a signature• If email security is REALLY a need, go for GPG encrypted emails• Stick to plain text / Do not use fancy email templates• Do not click on unknown attachments (esp. from unknown senders)
  28. 28. GPG for Mac / OS X
  29. 29. GPG for Windows
  30. 30. GPG for Ubuntu
  31. 31. Online, quick encryption
  32. 32. Safe & best email practices• Use phonetics to convey meaning: “Ooman writes” “whoman rites” “see I d” “ma hinder” “go tub a yaar”• Use words instead of human rights – say food, heat or supplies. E.g. “the heat is bad”, “the food is poor”, “supplies are bleak”.• Use BCC for group emails• Never use the same email for advocacy, professional emails, personal correspondence• Subject lines are NEVER encrypted• Caution and prevention more than remedy
  33. 33. Getting to blocked pages
  34. 34. TOR
  35. 35. Mobile phone security
  36. 36. What do you have on your mobile?• Contact names• Phone numbers• Emails• SMS history• Call logs• Photos• Video• Audio• Calendar information• Maybe even files• In short, not too different from data on your PC, and perhaps even more sensitive
  37. 37. Basic guidelines• Security on mobiles is still not as advanced as computers• Be mindful of data stored on mobile• Is it secured via a password?• Are there messages, call logs, emails or other data that can compromise security for self, colleagues and partners?• Invest in smartphone that can run Skype mobile for secure conversations• Do NOT share confidential information over SMS
  38. 38. Surveillance• For every phone currently on the network (receiving a signal, regardless of whether the phone has been used to call or send messages) the network operator has the following information: – The IMEI number – a number that uniquely identifies the phone hardware – The IMSI number – a number that uniquely identifies the SIM card – The TMSI number, a temporary number that is re-assigned regularly according to location or coverage changes but can be tracked by commercially available eavesdropping systems – The network cell in which the phone is currently located. Cells can cover any area from a few meters to several kilometers, with much smaller cells in urban areas and even small cells in buildings that use a repeater aerial to improve signal indoors. – The location of the subscriber within that cell, determined by triangulating the signal from nearby masts. Again, location accuracy depends on the size of the cell - the more masts in the area, the more accurate the positioning.
  39. 39. Mobile phone security primer
  40. 40. Security in a box
  41. 41. Thank