Most sensitive web transactions are protected by public-key cryptography, a type of encryption that lets computers share information securely without first agreeing on a secret encryption key.
Public-key encryption protocols are complicated, and in computer networks, theyre executed by software. But that wont work in the internet of things, an envisioned network that would connect many different sensors embedded in vehicles, appliances, civil structures, manufacturing equipment, and even livestock tags to online servers. Embedded sensors that need to maximize battery life cant afford the energy and memory space that software execution of encryption protocols would require.
MIT researchers have built a new chip, hardwired to perform public-key encryption, that consumes only 1/400 as much power as software execution of the same protocols would. It also uses about 1/10 as much memory and executes 500 times faster. The researchers describe the chip in a paper theyre presenting this week at the International Solid-State Circuits Conference.
Like most modern public-key encryption systems, the researchers chip uses a technique called elliptic-curve encryption. As its name suggests, elliptic-curve encryption relies on a type of mathematical function called an elliptic curve. In the past, researchers including the same MIT group that developed the new chip have built chips hardwired to handle specific elliptic curves or families of curves. What sets the new chip apart is that it is designed to handle any elliptic curve.
Cryptographers are coming up with curves with different properties, and they use different primes, says Utsav Banerjee, an MIT graduate student in electrical engineering and computer science and first author on the paper. There is a lot of debate regarding which curve is secure and which curve to use, and there are multiple governments with different standards coming up that talk about different curves. With this chip, we can support all of them, and hopefully, when new curves come along in the future, we can support them as well.
Joining Banerjee on the paper are his thesis advisor, Anantha Chandrakasan, dean of MITs School of Engineering and the Vannevar Bush Professor of Electrical Engineering and Computer Science; Arvind, the Johnson Professor in Computer Science Engineering; and Andrew Wright and Chiraag Juvekar, both graduate students in electrical engineering and computer science.
To create their general-purpose elliptic-curve chip, the researchers decomposed the cryptographic computation into its constituent parts. Elliptic-curve cryptography relies on modular arithmetic, meaning that the values of the numbers that figure into the computation are assigned a limit. If the result of some calculation exceeds that limit, its divided by the limit, and only the remainder is preserved. The secrecy of the limit helps ensure cryptographic security.
One of the computations to which the MIT chip devotes a special-purpose circuit is thus modular multiplication. But because elliptic-curve cryptography deals with large numbers, the chips modular multiplier is massive. Typically, a modular multiplier might be able to handle numbers with 16 or maybe 32 binary digits, or bits. For larger computations, the results of discrete 16- or 32-bit multiplications would be integrated by additional logic circuits.
The MIT chips modular multiplier can handle 256-bit numbers, however. Eliminating the extra circuitry for integrating smaller computations both reduces the chips energy consumption and increases its speed.
Another key operation in elliptic-curve cryptography is called inversion. Inversion is the calculation of a number that, when multiplied by a given number, will yield a modular product of 1. In previous chips dedicated to elliptic-curve cryptography, inversions were performed by the same circuits that did the modular multiplications, saving chip space. But the MIT researchers instead equipped their chip with a special-purpose inverter circuit. This increases the chips surface area by 10 percent, but it cuts the power consumption in half.
The most common encryption protocol to use elliptic-curve cryptography is called the datagram transport layer security protocol, which governs not only the elliptic-curve computations themselves but also the formatting, transmission, and handling of the encrypted data. In fact, the entire protocol is hardwired into the MIT researchers chip, which dramatically reduces the amount of memory required for its execution.
The chip also features a general-purpose processor that can be used in conjunction with the dedicated circuitry to execute other elliptic-curve-based security protocols. But it can be powered down when not in use, so it doesnt compromise the chips energy efficiency.
They move a certain amount of functionality that used to be in software into hardware, says Xiaolin Lu, director of the internet of things (IOT) lab at Texas Instruments. That has advantages that include power and cost. But from an industrial IOT perspective, its also a more user-friendly implementation. For whoever writes the software, its much simpler.
- Encryption: Avoiding the Pitfalls That Can Lead to Breaches - January 14th, 2019
- Encryption | Information Technology Services - December 31st, 2018
- Encryption - Investopedia - December 16th, 2018
- How to Protect Data at Rest with Amazon EC2 Instance Store ... - December 9th, 2018
- Next Generation Encryption - blogs.cisco.com - December 4th, 2018
- 3 Different Data Encryption Methods - DataShield blog - November 22nd, 2018
- Security and encryption | Documentation | Turtl - November 18th, 2018
- Encryption | General Data Protection Regulation (GDPR) - November 16th, 2018
- Using Encryption and Authentication Correctly (for PHP ... - November 13th, 2018
- Encryption | SANS Security Awareness - November 9th, 2018
- Types of Encryption | Office of Information Technology - November 5th, 2018
- Use Your own Encryption Keys with S3s Server-Side ... - October 29th, 2018
- What is Tokenization vs Encryption - Benefits & Uses Cases ... - October 12th, 2018
- Device Encryption | it.ucsf.edu - October 12th, 2018
- 5 Common Encryption Algorithms and the Unbreakables of the Future - September 15th, 2018
- Top 5 best encryption software tools of 2018 | TechRadar - August 26th, 2018
- New EBS Encryption for Additional Data Protection | AWS ... - August 22nd, 2018
- Best Encryption Software 2018 - Encrypt Files on Windows PCs - August 20th, 2018
- Download BestCrypt Volume Encryption 3.78.05 / 4.01.09 Beta - July 26th, 2018
- End-to-end encryption - Wikipedia - July 24th, 2018
- Download Symantec Encryption Desktop 10.4.0 Build 1100 - July 15th, 2018
- HTTPS - Wikipedia - July 10th, 2018
- AES encryption - June 20th, 2018
- Encrypt email messages - Outlook - June 20th, 2018
- Download Sophos Free Encryption 184.108.40.206 - softpedia.com - June 19th, 2018
- Does Skype use encryption? | Skype Support - June 16th, 2018
- Encryption- Computer & Information Security - Information ... - May 25th, 2018
- Enable BitLocker on USB Flash Drives to Protect Data - May 25th, 2018
- Transparent Data Encryption (TDE) - msdn.microsoft.com - April 12th, 2018
- Encryption Software Market - Global Forecast to 2022 - March 24th, 2018
- What AES Encryption Is And How It's Used To Secure File Transfers - March 24th, 2018
- Encryption vs. Cryptography - What is the Difference? - March 24th, 2018
- The Best Encryption Software - TopTenReviews - February 16th, 2018
- File-Based Encryption | Android Open Source Project - February 7th, 2018
- Beyond Encryption | Secure Enterprise email using existing ... - February 1st, 2018
- Azure Search enterprise security: Data encryption and user ... - January 26th, 2018
- Skype finally getting end-to-end encryption | Ars Technica - January 13th, 2018
- FBI chief says phone encryption is a 'major public safety issue' - January 13th, 2018
- Encryption and Export Administration Regulations (EAR) - December 27th, 2017
- Key (cryptography) - Wikipedia - December 21st, 2017
- security - Fundamental difference between Hashing and ... - December 15th, 2017
- What Is Encryption? | Surveillance Self-Defense - December 4th, 2017
- Comodo Disk Encryption Download - softpedia.com - December 1st, 2017
- Encryption - Simple English Wikipedia, the free encyclopedia - November 24th, 2017
- BitLocker Drive Encryption Overview - technet.microsoft.com - November 23rd, 2017
- The Encrypting File System - technet.microsoft.com - November 18th, 2017
- FBI cant break the encryption on Texas shooters smartphone - November 13th, 2017
- DOJ: Strong encryption that we dont have access to is ... - November 13th, 2017
- DOJ Fires Up New War With Apple Over Encryption - November 12th, 2017
- Security Awareness - Encryption | Office of Information ... - October 15th, 2017
- Data Encryption and Decryption (Windows) - October 14th, 2017
- Trumps DOJ tries to rebrand weakened encryption as responsible ... - October 11th, 2017
- How to encrypt (almost) anything | PCWorld - September 22nd, 2017
- Private Internet Access | VPN Encryption - September 21st, 2017
- Encryption Substitutes | Privacy | Encryption - September 21st, 2017
- Data Encryption: Hardware & Software Security: Online ... - September 21st, 2017
- How To Enable BitLocker Drive Encryption In Windows 10? - September 21st, 2017
- PGP Encryption Tool - iGolder - September 21st, 2017
- encryption - How to encrypt String in Java - Stack Overflow - September 21st, 2017
- Encryption Software Market, Size, Trends and Forecast 2020 - September 21st, 2017
- Encryption Definition - Tech Terms - September 20th, 2017
- Why You Should Be Encrypting Your Devices and How to Easily Do It - Gizmodo - September 6th, 2017
- Black Hats, White Hats, and Hard Hats The Need for Encryption in Mining and Resources - Australian Mining - September 6th, 2017
- How can enterprises secure encrypted traffic from cloud applications? - TechTarget - September 6th, 2017
- Encryption Explained - Arizona Daily Wildcat - September 6th, 2017
- News in brief: Call to link encryption to ID; Facebook maps everyone ... - Naked Security - September 2nd, 2017
- 'Independent' gov law reviewer wants users preemptively identified before they're 'allowed' to use encryption - The Register - September 2nd, 2017
- High-Dimensional Quantum Encryption Performed in Real-World ... - Futurism - September 2nd, 2017
- It's Time to Replace Your Encryption-Key Spreadsheet - Data Center Knowledge - September 2nd, 2017
- Legislation to limit smartphone encryption 'may be necessary,' deputy AG Rosenstein says - Washington Times - August 31st, 2017
- Cloud Encryption Market by Component, Service Model, Organization Size, Vertical And Region - Global Forecast to ... - Markets Insider - August 31st, 2017
- Cipher Suites: Ciphers, Algorithms and Negotiating Security Settings - Hashed Out by The SSL Store (registration) (blog) - August 31st, 2017
- Encryption in Office 365 - Office 365 - August 29th, 2017
- Need-to-Know Only: Use Encryption to Make Data Meaningless to ... - Security Intelligence (blog) - August 29th, 2017
- Four strategies to prevent data encryption from hijacking your network - Digital News Asia - August 29th, 2017
- Amber Rudd is wrong - real people do want end-to-end encryption - ITProPortal - August 29th, 2017
- Why encryption is for everyone - IFEX - August 29th, 2017
- 4D quantum encryption successful in first real-world test - New Atlas - New Atlas - August 29th, 2017
- For the First Time Ever, Quantum Communication is Demonstrated in Real-World City Conditions - Futurism - August 26th, 2017
- High-Dimensional Quantum Encryption Takes Place in Real-World ... - Photonics.com - August 26th, 2017