Open solutions, smarter people Security You are also part of the game This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License.
Security, you are also part of the game
May 20, 2015
Data is a big thing now a days. Data is everywhere. Data is collected on almost as many places. And a lot of people want to access your data. But why exactly is your data important? What can people / companies do with it? How can I keep my data safe. or that of my company? How do criminals get to your data? and most importantly, what can you do to avoid the fact that they steal your data?
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Open solutions, smarter people
Security
You are also part of the game
This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License.
Open solutions, smarter people
Who is that guy?
• Bert Desmet• 23 years old• Fedora – Ambassador, mentor, packager• Loadays – Co organizer • Numius – System Engineer, Consultant • Devnox – Developer, System Engineer
Open solutions, smarter people
Today's topics
• I'm a good hacker.• Why I love USB sticks.• Remember your password? • Shhhhhhht!
Open solutions, smarter people
I am a good hacker.
Open solutions, smarter people
No tech hacking?
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Shoulder surfing
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Dumpster diving
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Social engineering
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Taking pictures
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Why I love USB sticks.
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They are easy
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And small
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They are easily..
• Forgotten • Stolen
Open solutions, smarter people
Some thoughts about it
• Encrypt your sensitive data• Never put passwords on your system• Use the intranet • Never leave your portable gear alone• Never forget your gear
Open solutions, smarter people
Some statistics
• 53% of UK workers lost portable devices– >50% at a drinking venue
• Taxis and public transport
• 1 lost data record cost more than $187– 70% indirect cost
• Lost costumers
Open solutions, smarter people
Remember your password?
Open solutions, smarter people
How to choose a password
• Avoid using dictionary words• Use special characters and numbers• Change your password every month • Blah blah blah
Open solutions, smarter people
How to choose a password
• Avoid using dictionary words• Use special characters and numbers• Change your password every month • Blah blah blah
Open solutions, smarter people
Entropy
• H : Entropy• N : Possible symbols• Length of string
H=L∗log2 N
Open solutions, smarter people
Example time!
• This is.obviously a.bad passw0rd:-(– L : 35– W : 94 – H : ±230
• PrXyc.N(n4k77#L!eVdAfp9– L : 23– W : 94– H : ±151
Open solutions, smarter people
Time to crack a password
• [[Guesses before string is found = 2H]]• This is.obviously a.bad passw0rd:-(
– 2230 = 1.72543659 × 1069– 1000 guesses /s = 5.5 x 1058 years
• PrXyc.N(n4k77#L!eVdAfp9– 2151 = 2.85449539 × 1045– 1000 guesses /s = 9 × 1034 years
Open solutions, smarter people
Password Strenght
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Lastpass
• Fully encrypted • Generate extremely hard passwords • Choose a good master password!
Open solutions, smarter people
Some tips
• Never store passwords on pc • Never use autologin
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Shhhhhhhht!
Open solutions, smarter people
I want you to shut up!
Open solutions, smarter people
Security through obscurity
• Don't tell anyone • Security based on secrecy
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Kerckhoffs' doctrine
• Security can't depend on secrecy
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Reality
• There are always leaks – By accident – Deliberately
• Try to keep 'secrets'
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Wait! There is more!
Open solutions, smarter people
In a perfect world..
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There is always a hole.
Open solutions, smarter people
I like onions
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Multi Level Security
• Multiple systems • Building fort Knox • You are the first line of defense
Open solutions, smarter people
Extra! Extra!
Open solutions, smarter people
Something you have..
Open solutions, smarter people
Yubikey
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I preach.And I practice.
Open solutions, smarter people
Questions?
• Bert Desmet• Security, you are also part of the game
• Mail: [email protected]• Twitter: @bdesmet_• Website: http://blog.bdesmet.be• Website: http://www.devnox.eu • This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License.
Open solutions, smarter people
Sources• Chess game: http://www.flickr.com/photos/seeminglee/1479932683/
• Closed vault: http://www.flickr.com/photos/mstyne/3654056683/
• Open vault: http://www.flickr.com/photos/spotsgot/156025944/
• Onion: http://www.flickr.com/photos/inferis/107293622/
• Laptop + usb stick: http://www.flickr.com/photos/wstryder/2780310027/
• New York Public Library: http://www.flickr.com/photos/paul_lowry/2616820493/
• Statistics on loosing gear: http://www.securestix.com/bad_news.php
• Shoulder surfing: http://www.flickr.com/photos/bonzoesc/209474964/
• Dumpster: http://www.flickr.com/photos/urbanjacksonville/1803065217/
• Telephone call: http://www.flickr.com/photos/lst1984/994531885/
• Taking pictures: http://www.flickr.com/photos/glenpooh/708845839/
• Xkcd joke: http://xkcd.com/936/
• Shut up: http://www.flickr.com/photos/lorenia/934705558/
• 3way handhake: http://media.photobucket.com/image/3%20way%20handshake/Haley_Bug/Mission%20Trip%20Choir%20Tour%202006/100_0087.jpg?o=1
• Yubikey: http://www.flickr.com/photos/thofle/3206443137/
• Special thanks to: Johnny Long
Open solutions, smarter people
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