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Keeping Laptops Secure: Solutions

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Presentation on theme: "Keeping Laptops Secure: Solutions"— Presentation transcript:

1 Keeping Laptops Secure: Solutions
Defense Team: Mike Delahunty Bryan Lutz Kimberly Peng Kevin Kazmierski John Thykattil 1

2 Agenda Real world analysis of laptop security
Four cornerstones of secure computing as they relate to laptop security Confidentiality Authenticity Integrity Availability How can we apply these cornerstones to ensure laptop security?

3 Real World – Balancing Cost and Risk
The greater the security risk, the greater the cost to mitigate Software and administrative costs Some laptops need more security than others Bank employee’s laptop must be very secure Financial data could be compromised Government employee’s laptop must be very secure Public records could be compromised College student’s laptop might not need as much MP3s and videos could be lost

4 Real World – Business/Legal Consequences
A survey of almost 500 IT professionals in 2006 revealed that 81 percent of firms lost machines containing sensitive data last year.1 Loss of laptop containing personal data belonging to the public can lead to: Financial loss to those affected, and the company Stolen identities of those affected Lawsuits from those affected Loss of customers Lowered public perception of company

5 Real World - Feasibility Analysis
Companies must dedicate appropriate resources to maintain a sufficient level of security for laptops, based on their accepted level of risk Ranges from $10’s to $100’s per laptop IT personnel to administer laptops and keep them secure Employee training on security Having the appropriate level of laptop security should always be feasible, or the company is not doing their due diligence.

6 Solutions to Ensure Laptop Data: Confidentiality
Laptop Data Encryption Two Types of Encryption File Full Disk (Preferred) Most Encryption Products are FIPS Certified US Federal Information Processing Standards (FIPS) certification from the National Institute of Standards and Technology (NIST), which verified the encryption algorithms in the products as conforming to the Advanced Encryption Standard (AES) algorithm

7 Case Study: BitLocker Microsoft Product with Windows Vista
Targets the Lost Laptop Encrypts operating system volume on a sector by sector basis Two Layer Approach Cipher Layer: Well-Established Cipher, AES in CBC mode Diffuser Layer: Unproven algorithm; premise is to make manipulation for authentication attacks harder

8 Case Study: BitLocker Cont.
Premise/Design Approach Software Based Attacks Most Prevalent BitLocker does not require user to enter special boot password or use boot SmartCard or USB device Hardware Attacks Rare but Supported with TPM Chip Seal/Unseal Function used to encrypt key which can only be decrypted by same TPM chip; other OS’es can be booted and fully functional, but drive cannot be read.

9 Case Study: BitLocker Secure Boot Process
If Attacker has access to ciphertext, and modifies it to create weakness in the normal boot process Authenticate Data From Disk Poor Man’s Authentication: trust that changes in ciphertext do not translate to semantically sensible changes in the plaintext 512 to 8192 byte block cipher If attacker changes any part of ciphertext, all plaintext in that sector is changed randomly

10 Solutions to Ensure Laptop Data: Confidentiality
Physical Security Keep Devices in Safe Locations Lock them up LCD Privacy Screens Don’t Display Confidential Documents in Public Areas Lock Down Ports: USB, IEEE 1394, etc. Exploitation of Legitimate Forensics Tools Use TPM Chip to thwart hardware attacks

11 Authenticity Solutions
Make it difficult to guess passwords and account names Disable well known accounts such as “guest” and “administrator” Disallow passwords that contain login names, dictionary words, or simple variants of previous passwords Require long passwords with a mix of characters, numbers, and symbols Use systems that employ SHA-512 or MD5

12 Authenticity Solutions Cont.
Disable access to I/O ports Popular vendors of security products offer software that blocks the use of removable storage devices and media. This can prevent theft of data through USB devices or booting alternate operating systems on CD.

13 Authenticity Solutions
Prevent users from connecting to rogue access points Host-based: Require the use of secure tunnels whenever using any connection outside of the company. VPN clients can be launched at startup, however this can lead to connectivity problems. Network-based: Employ software that detects and shuts down rogue access points installed within the company’s network. An example would be RogueScanner, which is an open source tool for detecting rogue devices.

14 Integrity Solutions Do not give laptop users “administrative” rights Prohibits the installation of unapproved software Most malware / spyware exploits administrative privileges to install without user knowledge Provides greater stability - extraneous software not running in the background Laptops run more efficiently and quickly Less need for maintenance Only allow network administrators to install approved software Have a standardized, approved laptop image

15 Integrity Solutions Cont.
Do not allow laptops on the network with expired Virus definitions Use a product such as Cisco Clean Access to place the laptop on a quarantined subnet upon first connection, download current virus definitions, and grant access once the laptop is in compliance Do not allow laptops to use unsecured wireless networks Enforce minimum requirements for wireless access using group policy or similar Do not allow open access SSIDs or WEP

16 Retaining Availability
Availability - The ability to use the information or resource desired A loss of availability is a loss of data Logical Prevention Data redundancy - Ex: Oracle's “Data Guard” Virtualization software Regular backups to corporate network Physical Prevention “Toughbook” laptops Oracle's “Data Guard”

17 Retaining Availability Cont.
Cost (per 100 users) Data Redundancy Oracle's “Data Guard” - $6k (enterprise license) Virtualization VMWare's “bundle pack” - $15k for 100 Virt. Machines Toughbooks 3x over standard laptops At 50% enterprise discount: $100k for 100 users Simple data redundancy through server backups is most cost effective. However, high availability has its drawbacks.....

18 Retaining Availability Cont.
Risks High Availability comes at a price Performance – synchronization for backups, loading virtual machines, n/w latency Deployment – costs, training, personel Feasibility 99% uptime = 8,649 hrs/yr or 87 hrs downtime / yr If 95% uptime is good enough, Gartner suggests doing nothing. Source: Gartner Research

19 Laptop Security Solutions - Conclusion
There is no “silver bullet” product that covers all areas of laptop security Use a combination of products to achieve your optimal level of security Keep the balance between usability and security Employees must be able to work effectively while remaining secure

20 Questions? 20


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