Digital Security for Everyone
Jennifer Helsby
@redshiftzero
Chicago Hack Night
November 10, 2015
@CryptopartyChi
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But I have nothing
to hide.
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But I have nothing
to hide.
Yes, you do.
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But I have nothing
to hide.
Yes, you do.
Your medical information, your financial information, your
political beliefs, your sexual identity, nudity, …
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People have been defending their
own privacy for centuries with
whispers, darkness, envelopes,
closed doors, secret handshakes,
and couriers.
- Eric Hughes
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There is nothing illegal or
subversive
about using a tool to
protect your privacy online.
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What is Cryptoparty?
• A grassroots international movement to
provide spaces for people of all types to get
training in digital security
• Non-commercial and free
• Significant interest among activism, law,
journalism, LGBT communities
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Threat Modeling
• What information am I trying to protect?
• Who am I trying to protect it from (my
adversary)?
• What is my adversary able and willing to do
to find out?
• What happens if I fail?
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• Goal is NOT: Perfect security
• Goal is: Make surveillance significantly more
difficult and costly
• Win: Exert slightly more effort than your
adversary is willing to commit
Signal Private Messenger
• End-to-end
encrypted calls and
messages
• Encrypted content,
not metadata
• Support on Android
and Apple IOS
• Free and open-
source
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Anonymity
• Anonymity means you can’t tell who did what
• Tor anonymizes your identity from the
destination website, your ISP, employer,
government, etc.
• Browse the web anonymously with the Tor
Browser Bundle
https://www.torproject.org