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The remote wipe feature is very secure as well as the secure delete via -- <br />
<br />
Settings &gt;&nbsp;General &gt;&nbsp;Reset &gt;&nbsp;Erase All Contents and Settings.
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The remote wipe feature is very secure as well as the secure delete via --

Settings > General > Reset > Erase All Contents and Settings.

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It's much faster to plug it into iTunes and click restore. Takes about 10 min. I used the option on the device and it took 2 hours. 
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It's much faster to plug it into iTunes and click restore. Takes about 10 min. I used the option on the device and it took 2 hours.

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Here is some info:<br />
<br />
<a href="http://www.wired.com/gadgetlab/2009/07/iphone-encryption/" rel="ugc">http://www.wired.com/gadgetlab/2009/07/iphone-encryption/</a><br />
<br />
title says it all. I have a iPhone and I wouldn't sell it to a stranger. ;-)<br />
<br />
/MadJax
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Here is some info:

http://www.wired.com/gadgetlab/2009/07/iphone-encryption/ [http://www.wired.com/gadgetlab/2009/07/iphone-encryption/]

title says it all. I have a iPhone and I wouldn't sell it to a stranger. ;-)

/MadJax

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That article has nothing to do with the current question. It's about extracting data from a locked phone. Not a wiped phone. 
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That article has nothing to do with the current question. It's about extracting data from a locked phone. Not a wiped phone.

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<div class="content wysiwyg-content">
To securely erase all my data from an iPhone 3G, is the built in functionality sufficient or is data recovery still possible? Should I be doing something else in addition to this, should I run the erase function multiple times?
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To securely erase all my data from an iPhone 3G, is the built in functionality sufficient or is data recovery still possible? Should I be doing something else in addition to this, should I run the erase function multiple times?

Is the built in iPhone erase function secure enough or should I do more?

The iPhone is a smartphone made by Apple Inc. It and the iPad, along with several other mobile devices from Apple, run on the iOS operating system, which has its own topic, as does the iPad for device-specific questions. Native iOS applications are written in Objective-C or in Swift using the Cocoa Touch frameworks or HTML5 compiled with the help of a package manager such as Adobe PhoneGap; a common IDE is Xcode.

iPhone

Digital forensics encompasses the recovery and investigation of material found in digital devices, often in relation to computer crime. Digital forensics investigations have a variety of applications. The most common is to support or refute a hypothesis before criminal or civil (as part of the electronic discovery process) courts. The technical aspect of an investigation is divided into several sub-branches, relating to the type of digital devices involved; computer forensics, network forensics, forensic data analysis and mobile device forensics. The typical forensic process encompasses the seizure, forensic imaging (acquisition) and analysis of digital media and the production of a report into collected evidence.

Digital Forensics

Security is the protection of information systems from theft or damage to the hardware, the software, and the information on them, as well as from disruption or misdirection of the services they provide. The main goal of security is protecting assets, and an asset is anything of value and worthy of protection.  Information Security is a discipline of protecting information assets from threats through safeguards to achieve the objectives of confidentiality, integrity, and availability or CIA for short. On the other hand, disclosure, alteration, and disruption (DAD) compromise the security objectives.