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A history on security and how to win the battle... Joshua Thijssen

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Channeling and restricting flow

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Sometimes channels don’t listen

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Failure is always an option

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Security is a business value

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Security is a business value

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Security is a business value

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Let others take care of security

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Let others take care of security

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History of (computer) security

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Security in the “old days”

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I wasn’t kidding when I said: “old days”

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5.25” high density disks

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5.25” high density disks

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Copying was a breeze

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Copy protection

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Copy protection

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Let’s try dongles

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NOPE!

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8086 segmented memory layout

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8086 segmented memory layout segment reg. 16-bit

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8086 segmented memory layout segment reg. offset reg. 16-bit 16-bit

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8086 segmented memory layout segment reg. offset reg. physical address 16-bit 16-bit 20-bit

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8086 segmented memory layout segment reg. offset reg. << 4 physical address 16-bit 16-bit 20-bit

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8086 segmented memory layout segment reg. offset reg. << 4 + physical address 16-bit 16-bit 20-bit

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07C0:0050 07C00 0050+ 07C50 8086 segmented memory layout segment reg. offset reg. << 4 + physical address 16-bit 16-bit 20-bit

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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

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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

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8086 segmented memory layout segment reg. offset reg. << 4 + physical address 16-bit 16-bit 20-bit

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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

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Ring 0 Kernel

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Ring 0 Kernel Ring 1 Device drivers

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Ring 0 Kernel Ring 1 Device drivers Ring 2 Device Drivers

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Ring 0 Kernel Ring 1 Device drivers Ring 2 Device Drivers Ring 3 Applications

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Security today

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The weakest link

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Humans

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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

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Raising awareness on browsers

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It’s a trap!

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We’re curious

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People are resourceful

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Weird hobby’s

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Weird hobby’s

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00710022211101015511130102359000000000

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00710033308171115011231111700000000000

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00710033308171115011231111700000000000 00710022211101015511130102359000000000

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00710033308171115011231111700000000000 00710022211101015511130102359000000000

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00710022211101015511130102359000000000 00710033308171115011231111700000000000

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00710044401011200001231122359000000000

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Magnetic card reader/writer: $ 250

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Magnetic card reader/writer: $ 250 Parking costs per night: $40

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Magnetic card reader/writer: $ 250 Parking costs per night: $40 Free parking: priceless

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How can we cure this problem?

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We need to implement REAL security, not fake.

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How do we win the war? How do we win the war?

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If we as developers have to keep thinking about security, we will lose...

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We need to deflect *EVERY* attack, They only need *ONE* to win...

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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.

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A day in the life of a PHP programmer...

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$result = mysql_query('SELECT * FROM users WHERE username="'.$_GET['username'].'"');

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You should use mysql_real_escape_string!

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No, you shouldn’t!

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You just put a developer who wasn’t aware of security issues, in charge of security...

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Let others handle security (PDO)

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There is no (quick) solution.

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There is no (quick) solution. but we have to change the way we deal with security radically,

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There is no (quick) solution. but we have to change the way we deal with security radically, by not dealing with security...

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Let others take care of security

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Any questions (maximum 5)?

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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