What is unique device identifier (UDID)? - Definition from WhatIs.com

Definition

unique device identifier (UDID)

Part of the Wireless and mobile glossary:

A unique device identifier (UDID) is a 40-character string assigned to certain Apple devices including the iPhone, iPad, and iPod Touch. Each UDID character is a numeral or a letter of the alphabet.

Using the UDID, third parties, particularly app vendors, can track subscriber behavior. These companies can learn what the user likes, and then tailor advertising accordingly. Unfortunately, this UDID feature carries the potential for abuse. In 2010, some users began to complain about unauthorized exposure of their individual identities. Some apps, for example, associated users' real names with device UDIDs without subscribers' knowledge or permission. 

Because of mounting privacy concerns on the part of device owners, Apple began discouraging app developers from tracking customers with UDIDs. In 2012, Apple began rejecting apps that make use of UDIDs.

This was last updated in June 2012
Contributor(s): Stan Gibilisco
Posted by: Margaret Rouse

Related Terms

Definitions

  • mobile deep linking

    - Mobile deep linking makes it easier for people to access resources on smartphones, tablets and other mobile devices because it decreases the number of actions they have to take to get to their targ... (WhatIs.com)

  • Apple Joint Venture

    - Apple Joint Venture is an IT support and training service geared toward small and midsized businesses. (SearchConsumerization.com)

  • Android for Work

    - Android for Work is a program for devices running on the Google Android mobile operating system that allows IT to manage and secure business applications on a work-specific profile. (SearchConsumerization.com)

Glossaries

  • Wireless and mobile

    - Terms related to wireless and mobile technology, including definitions about consumer mobile technology devices and communication technologies such as Wi-Fi, WiMAX and LTE.

  • Internet applications

    - This WhatIs.com glossary contains terms related to Internet applications, including definitions about Software as a Service (SaaS) delivery models and words and phrases about web sites, e-commerce ...

Ask a Question About unique device identifier (UDID)Powered by ITKnowledgeExchange.com

Get answers from your peers on your most technical challenges

Tech TalkComment

Share
Comments

    Results

    Contribute to the conversation

    All fields are required. Comments will appear at the bottom of the article.