Mobile endpoint security: What enterprise infosec pros must know now
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Ideally, IT should be at least aware of every smartphone and tablet used in an organization, from activation to...
retirement. Accomplishing this requires a cohesive plan for mobile device management.
As business use of smartphones and tablets continues to grow, inadequate IT oversight and control is having negative effects. Up to one-third of companies acknowledge that smartphone use is being hindered or slowed because IT admins cannot manage the devices to the extent they would like, according to a 2012 Osterman Research study; the situation is even worse for tablets.
Mobile devices: Out of sight, out of mind
For the past decade, IT departments turned a blind eye to mobile handhelds, believing that cell phones were too limited and PDAs saw too little use to warrant attention. But today's increasingly powerful converged mobile devices have blown past both barriers, leaving IT in the hot seat. After all, you cannot secure what you don't manage, and you cannot manage what you don't see.
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Creating a mobile device security policy
Mobile device management (MDM) can help your business plug this gaping hole by enabling remote visibility and control over smartphones and other handheld devices carried by your workforce. But MDM can also be a frustratingly vague term, applied to a diverse collection of products. The first step is to define precisely what you want an MDM system to do for your mobile workforce. The following checklist can help you identify your needs and common MDM capabilities that could address them.
Mobile asset inventory
Clearly, your MDM must maintain a list of devices to be managed -- that is, your mobile asset inventory. But what should your inventory include, and how will it be maintained?
- Device inventory: What physical details do you need to track? Beyond the basics (device ID, hardware model, firmware version), an MDM can help you record and report on related assets like wireless adapters and removable memory.
- Inventory classification: How do you want to group those mobile devices? For example, an MDM might auto-classify your devices by mobile OS/version or state (e.g., unknown, authorized, provisioned, decommissioned).
- Inventory maintenance: How do you want to update your inventory to reflect adds, changes and deletes? An MDM might be used to periodically poll devices, check for changes at network connect, or carry out admin-initiated audits.
- Physical tracking: Do you need to know not just who carries each handheld but precisely where that device is located? With many smartphones now supporting GPS, location-based MDM features become feasible.
- Database integration: Do you already have inventory systems that manage other assets (e.g., desktops, phones)? If so, you may want to integrate managed mobile device records into a common database using inventory exports or reports.
Mobile device provisioning
Managing a device through its lifecycle begins with activation and provisioning. How will each new device become an authorized, capable member of your handheld fleet?
- Supported platforms: Device management depends on many characteristics, including operating system and vendor/model/version. What platforms (e.g., Apple iOS, Google Android, BlackBerry OS, Microsoft Windows Phone) and minimum models/versions (e.g., Samsung SAFE devices running Android 4+) must you support? Make device-independent management choices wherever possible and practical while establishing baseline acceptance criteria for specific business uses (e.g., hardware-encrypted devices with remote find/wipe capability).
- Device registration: How will you enroll mobiles to be managed? MDMs can help administrators register company handhelds (e.g., directory add) or let users register their own devices (e.g., enrollment portals), or some combination thereof.
- Agent activation: How will MDM software get installed and activated on each new device? Some mobile devices ship with native MDM (e.g., Apple iOS, BlackBerry OS); others may require employees to visit an app store or an IT-managed Web portal to download and install an MDM agent. The latter is often accomplished by texting or emailing a URL to each enrolled device to complete over-the-air installation.
- Device configuration: How will you override factory/carrier defaults? For example, you might want to require passwords, add registry keys, or rewrite menus to eliminate non-business applications. MDMs can apply your "standard config" to each device after initial activation or hard reset.
Mobile software distribution
Many MDMs go beyond device inventory and configuration, providing tools that deliver and update mobile applications. This may not be Job 1, but it should be a close second.
- Software packages: How will you bundle related applications for purposes of configuration and delivery? MDMs can help you define and deploy those packages, helping to resolve platform, memory, and application dependencies.
- Application distribution: Do you want software and updates to be downloaded from public app stores (e.g., Apple iTunes, Google Play), pushed transparently to managed devices by an enterprise app store, or some combination thereof? Each mobile OS enforces its own rules regarding user permissions required to install and update apps, but MDMs can help IT automate related processes (e.g., prompting users to install required public apps).
- Mobile optimizations: Must your strategy accommodate unreliable or limited WANs? Some MDMs offer compression, incremental updates, and bandwidth management (attempting or resuming installation only over fast, low-cost links).
- Change control: How often will your mobile applications need patching or update? Define how deployed packages will be maintained so that changes are applied without resulting in user pain or weeks of effort to fix failed updates.
Mobile security management
On handhelds, device and security management tend to converge. Many MDMs offer basic security features that are missing from mobile OSs or related to device tasks.
- User authentication: How will you authenticate users before granting access to mobile devices? Some MDMs can be integrated with enterprise directories while addressing mobile needs like network-disconnected authentication.
- Password policy enforcement: How many login attempts will you allow before requiring reset? Can emergency calls bypass authentication? Many MDM agents can enforce these and other password policies that go beyond OS-provided PINs.
- Remote device wipe: Do you need the ability to wipe clean a remote mobile device? For example, an MDM can often delete data or hard-reset a lost smartphone on next server connect or upon receipt of an SMS "kill pill."
- White/black lists and device restrictions: An MDM involved in application management may require certain business applications and ban other applications. Similarly, an MDM that controls device settings can help you disable risky interfaces and wireless options.
- Secure communication: How will sensitive MDM traffic (e.g., configuration changes, software packages) be protected? Some MDMs provide their own secure channels rather than relying on OS or third-party protocols.
Mobile data protection
Data just might be the most sensitive corporate asset on any mobile handheld. MDMs can help you preserve and protect that mobile data.
- Data encryption: Do you want to enforce policies that use hardware or software encryption to prevent unauthorized access to data stored on mobile devices? Most contemporary mobile devices provide hardware encryption capability; others can enforce your policies by installing or activating third-party encryption (e.g., secure data lockers, self-encrypting enterprise applications).
- Backup/restore: How will you prevent data loss when a mobile device is damaged or stolen? Most mobile devices support scheduled over-the-air backup of selected settings and content to a cloud backup service for subsequent restoration by authorized users. Consider whether you also need to back up enterprise application data to an IT-controlled backup server.
- Data tracking: Do you need to maintain an audit trail of corporate data copied to and from mobile devices? Some MDMs can control and report on sensitive files transferred during over-the-air synchronization or onto removable media.
Monitoring and help desk support
Mobile device total cost of ownership can far exceed hardware/software purchase. Over time, MDM should pay for itself by reducing maintenance and support costs. How?
- Self-help: Can some admin tasks be cost-effectively shifted away from IT? Some MDMs offer self-help portals for user-initiated device enrollment, password reset or recovery, optional package download, and data restoration from backup.
- Diagnostics: When problems arise, what will your help desk need to see? MDMs can play a big role by providing not just intended settings but real-time status and health information (e.g., memory, battery, network connectivity).
- Remote control: When remote users need assistance, what can your help desk really do? Many MDMs include remote-control features (e.g., screen sharing) that let support staff interact with an off-site handheld in real time.
- Audit and compliance: Do you need to prove that mobile devices comply with your stated policies and/or industry privacy regulations? MDMs can help you automate remote assessment, remediation, and compliance reporting.
- Activity reports: How much insight will you need into mobile user activities, including interaction with business servers and networks? Most MDMs provide historical reports -- but look closely to see whether they capture what you need to know.
Your company probably does not need everything on this checklist, and any single MDM product is unlikely to cover all of these bases. Instead, treat this checklist as though it were a menu, introducing you to a foreign cuisine. Some considerations are simply variations on traditional desktop management needs, while others may be new and unfamiliar. Try a few MDMs to gain field experience with mobile user and device requirements before settling on an enterprise mobility management strategy for your workforce.