Doulci boling biography

BlackHat: Iphone Security

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BH_US_11_DaiZovi_iOS_Security_WP.pdf

Trail of Bits

BLACK HAT USA 2011 //BRIEFINGS


CAESARS PALACE LAS VEGAS, NV • AUGUST 3 - AUGUST 4

Apple iOS 4 Security Evaluation

Dino A. Dai Zovi


Principal
Trail of Bits LLC

Version: 1.0
Trail of Bits

Table of Contents

ASLR 1

Overview 1

Assessment 3

Code Signing 4

Mandatory Code Signing 4

Code Signing Enforcement 11

AppleMobileFileIntegrity 11

Dynamic Code Signing 13

Assessment 14

Sandboxing 15

Introduction 15

Application Containers 15

Sandbox Profiles 15

Assessment 22

Data Encryption 24

Overview 24

Hardware Encryption 24

Apple iOS Security Evaluation i


Trail of Bits

Data Protection API 25

Filesystem Encryption 25

iOS Passcodes 26

Data Protection API Coverage 27

Assessment 29

Apple iOS Security Evaluation ii


Trail of Bits

ASLR

Overview
Address Space Layout Randomization (ASLR) is an important protection that makes the remote exploitation of memory
corruption vulnerabilities significantly more difficult. In particular, when it is fully


I’ll get right to the point: Warlocks shouldn’t exist in 5e

I know, I know - put the pitchfork down for just a moment. 

It’s not that Warlock’s aren’t fun (they are). 

It’s not that they’re game breaking (they aren’t). 

It’s not that the basic concept is bad (blood pacts and oaths with ancient beings are a staple of the fantasy genre, and they make for fantastic storytelling). 

And it’s also not t that they’re particularly broken mechanically (a few talks with your players or creative combat design can mitigate the ole Eldritch Blast issue). 

No - Warlocks shouldn’t exist, at least not how they are built and played in 5e, because they are fundamentally unfair to the other classes.

Let me explain. 


Baby’s First Blood Pact (Warlocks in 3.5e)

To begin with, it helps to take a look at the origins of the warlock class. It first showed up as a class in 3.5e, designed specifically to be able to outpower any other spellcaster of the same level. It’s concept is simple: a spellcaster that gains their powers through a pact with a powerful entity. 

So, an arcane spellcaster wh

(Published in Dawn Images – The Review on Jan 29, 2012)

Not everyone wants to be bundled up in cumbersome coats and woolen mufflers when it gets chilly. Stylish women also like to keep it elegant and sophisticated with the drape of a simple shawl around their shoulders; something pure and warm to beat the cold without adding too much bulk. And when it comes to shawls, there are essentially only two types: the classic shawl and the contemporary shawl.

Arjumand Amin of Mahnoush (a young lawn brand) wears an embroidered shahtoosh shawl from her mother Mehvash Amin’s private collection

The most coveted classic shawl is usually the priceless shahtoosh, Persian for ‘king of fine wools’. Pure toosh is woven from the down of (endangered) Tibetan antelopes and is therefore considered very exotic; the shawl is so fine that it can be passed through a wedding ring. Practically weightless and as soft as down, the shahtoosh is what every women desires to have, though the high price (that runs into hundreds of thousands) usually makes it unaffordable. It is more of

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