Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
A history on security and how to win the battle
Search
Joshua Thijssen
August 19, 2012
Technology
2
80
A history on security and how to win the battle
Joshua Thijssen
August 19, 2012
Tweet
Share
More Decks by Joshua Thijssen
See All by Joshua Thijssen
RAFT: A story on how clusters of computers keep your data in sync
jaytaph
0
28
The first few milliseconds of HTTPS
jaytaph
0
170
Paradoxes and theorems every developer should know
jaytaph
0
220
Paradoxes and theorems every developer should know
jaytaph
0
520
The first few milliseconds of HTTPS - PHPNW16
jaytaph
1
170
compiler_-_php010.pdf
jaytaph
0
79
Paradoxes and theorems every developer should know
jaytaph
0
180
Introduction into interpreters, compilers and JIT
jaytaph
1
220
Paradoxes and theorems every developer should know
jaytaph
1
830
Other Decks in Technology
See All in Technology
2024-10-30-reInventStandby_StudyGroup_Intro
shinichirokawano
1
630
【技術書典17】OpenFOAM(自宅で極める流体解析)2次元円柱まわりの流れ
kamakiri1225
0
210
バクラクにおける可観測性向上の取り組み
yuu26
3
420
生成AIと知識グラフの相互利用に基づく文書解析
koujikozaki
1
140
CAMERA-Suite: 広告文生成のための評価スイート / ai-camera-suite
cyberagentdevelopers
PRO
3
270
Aurora_BlueGreenDeploymentsやってみた
tsukasa_ishimaru
1
120
日経電子版におけるリアルタイムレコメンドシステム開発の事例紹介/nikkei-realtime-recommender-system
yng87
1
500
visionOSでの空間表現実装とImmersive Video表示について / ai-immersive-visionos
cyberagentdevelopers
PRO
1
110
コンテンツを支える 若手ゲームクリエイターの アートディレクションの事例紹介 / cagamefi-game
cyberagentdevelopers
PRO
1
130
Forget efficiency – Become more productive without the stress
ufried
0
140
Vueで Webコンポーネントを作って Reactで使う / 20241030-cloudsign-vuefes_after_night
bengo4com
4
2.5k
フルカイテン株式会社 採用資料
fullkaiten
0
36k
Featured
See All Featured
Easily Structure & Communicate Ideas using Wireframe
afnizarnur
191
16k
Automating Front-end Workflow
addyosmani
1365
200k
Understanding Cognitive Biases in Performance Measurement
bluesmoon
26
1.4k
Building Adaptive Systems
keathley
38
2.2k
Keith and Marios Guide to Fast Websites
keithpitt
408
22k
A designer walks into a library…
pauljervisheath
202
24k
Refactoring Trust on Your Teams (GOTO; Chicago 2020)
rmw
31
2.7k
A better future with KSS
kneath
238
17k
VelocityConf: Rendering Performance Case Studies
addyosmani
325
24k
Rails Girls Zürich Keynote
gr2m
93
13k
Templates, Plugins, & Blocks: Oh My! Creating the theme that thinks of everything
marktimemedia
26
2.1k
How to Think Like a Performance Engineer
csswizardry
19
1.1k
Transcript
A history on security and how to win the battle...
Joshua Thijssen
Channeling and restricting flow
Sometimes channels don’t listen
Failure is always an option
Security is a business value
Security is a business value
Security is a business value
Let others take care of security
Let others take care of security
History of (computer) security
Security in the “old days”
I wasn’t kidding when I said: “old days”
5.25” high density disks
5.25” high density disks
Copying was a breeze
Copy protection
Copy protection
Let’s try dongles
NOPE!
8086 segmented memory layout
8086 segmented memory layout segment reg. 16-bit
8086 segmented memory layout segment reg. offset reg. 16-bit 16-bit
8086 segmented memory layout segment reg. offset reg. physical address
16-bit 16-bit 20-bit
8086 segmented memory layout segment reg. offset reg. << 4
physical address 16-bit 16-bit 20-bit
8086 segmented memory layout segment reg. offset reg. << 4
+ physical address 16-bit 16-bit 20-bit
07C0:0050 07C00 0050+ 07C50 8086 segmented memory layout segment reg.
offset reg. << 4 + physical address 16-bit 16-bit 20-bit
07C0:0050 07C00 0050+ 07C50 0000:7C50 00000 07C50+ 07C50 8086 segmented
memory layout segment reg. offset reg. << 4 + physical address 16-bit 16-bit 20-bit
07C0:0050 07C00 0050+ 07C50 0000:7C50 00000 07C50+ 07C50 007C:7490 007C0
07490+ 07C50 8086 segmented memory layout segment reg. offset reg. << 4 + physical address 16-bit 16-bit 20-bit
8086 segmented memory layout segment reg. offset reg. << 4
+ physical address 16-bit 16-bit 20-bit
386 protected memory layout + descriptor directory entry page table
entry physical address directory page offset cr3 gdt / ldt page directory page table page frame linear address descriptor table selector offset 32-bit 16-bit
None
None
Ring 0 Kernel
Ring 0 Kernel Ring 1 Device drivers
Ring 0 Kernel Ring 1 Device drivers Ring 2 Device
Drivers
Ring 0 Kernel Ring 1 Device drivers Ring 2 Device
Drivers Ring 3 Applications
Security today
The weakest link
Humans
it is much easier to trick someone into giving a
password for a system than to spend the effort to crack into the system -- K. Mitnick
Raising awareness on browsers
It’s a trap!
We’re curious
People are resourceful
Weird hobby’s
Weird hobby’s
00710022211101015511130102359000000000
00710033308171115011231111700000000000
00710033308171115011231111700000000000 00710022211101015511130102359000000000
00710033308171115011231111700000000000 00710022211101015511130102359000000000
00710022211101015511130102359000000000 00710033308171115011231111700000000000
00710044401011200001231122359000000000
None
Magnetic card reader/writer: $ 250
Magnetic card reader/writer: $ 250 Parking costs per night: $40
Magnetic card reader/writer: $ 250 Parking costs per night: $40
Free parking: priceless
How can we cure this problem?
We need to implement REAL security, not fake.
How do we win the war? How do we win
the war?
If we as developers have to keep thinking about security,
we will lose...
We need to deflect *EVERY* attack, They only need *ONE*
to win...
99.999% of all programmers are NOT trained or have the
capability to identify security threats. The other 0.001% will not be able to identify them ALL OF THEM ALL THE TIME.
A day in the life of a PHP programmer...
$result = mysql_query('SELECT * FROM users WHERE username="'.$_GET['username'].'"');
You should use mysql_real_escape_string!
No, you shouldn’t!
You just put a developer who wasn’t aware of security
issues, in charge of security...
Let others handle security (PDO)
There is no (quick) solution.
There is no (quick) solution. but we have to change
the way we deal with security radically,
There is no (quick) solution. but we have to change
the way we deal with security radically, by not dealing with security...
Let others take care of security
Any questions (maximum 5)?
Find me on twitter: @jaytaph Find me for development and
training: www.noxlogic.nl Find me on email:
[email protected]
Find me for blogs: www.adayinthelifeof.nl Thank you! http://joind.in/6853