The American Medical Association (AMA) has published an excellent resource on data encryption. The publication is called HIPAA Security Rule: Frequently asked questions regarding encryption of personal health information. I urge you to read the whole document but I will point out a few of the important sections.
1. I manage a small practice. Why should I care about the changes to the HIPAA Security Rule?
Perhaps the most significant of the changes to the HIPAA Security Rule is the requirement for HIPAA-covered entities and their business associates to provide notification in the event of a breach of “unsecured protected health information [PHI].” This means, for example, that if a hacker were able to gain access to a physician practice’s computer system that contained patient information, the physician practice would have to inform all patients and the Department of Health and Human Services (HHS) of the breach. In some cases, the physician practice would also need to notify the media. The one and only exception to this new requirement is encryption technology: If the electronic PHI (or ePHI) is stored and transmitted in encrypted form, then you do not need to notify patients, even if there is a security breach.
The last line if very important. If data is encrypted and there is a security breach there is no need to notify patients. For example, if a laptop with a lot of patient data, financials, SSN, progress notes, etc. is lost but the laptop was encrypted there is no need to notify patients that the data was lost. Basically encryption is a “get out of jail free card”.
The documents goes on the explain what encryption is, how encryption works, and describes the use of keys to encrypt the data.
Other good questions that are discussed:
7. Which types of data can be encrypted?
Any kind of data can be encrypted. You can encrypt plain text files, PDF documents, spreadsheets, images and any other form of information in your computer. You can even encrypt database information and information on back-up media.
8. Which data should a physician practice typically encrypt?
You should encrypt any systems and individual files containing ePHI. Data you should encrypt includes your practice management system; electronic medical records; documents containing ePHI, such as claims payment appeals; scanned images, such as copies of remittance advices; e-mails containing ePHI; and ePHI that you transmit, such as the claims sent to a clearinghouse.
9. Do e-mails containing ePHI have to be encrypted?
Yes, e-mails containing ePHI must be encrypted. E-mail is not like mailing a sealed letter or package. It is more like sending a postcard. People are not supposed to read it while it is in transit, but it passes through many hands, and one can never be sure that someone is not reading it illegally. Fortunately, there are many tools available for encrypting e-mail.
10. Does ePHI that is accessed via the Internet need to be encrypted?
Yes, data that is published on the Internet is available to the public. The only way to protect health information that is made available on a Web site is to use a technology known as “secure sockets layer” (SSL). You are probably already using this encryption method, whether you are aware of it or not. Any Web site that has a URL (i.e., an Internet address) beginning with “https” is using SSL or a similar encryption method. When you are on these Web sites, you may notice a small padlock icon on your browser. Double-clicking this icon usually gives you more information about how that browsing session is protected.
12. How can I encrypt the data on my computers?
You have several choices. There are built-in encryption programs, such as Microsoft® Encrypting File System (EFS), which you can use simply by changing the properties of the folder in which the sensitive data is kept (if you use a computer with Microsoft Windows®). Most of the popular data base technologies, such as Microsoft SQLServer®, MySQL®, Oracle® and Sybase®, include an encryption option you can use. There are also several encryption products, such as Pretty Good Privacy® (PGP®), that you can purchase and install on your computer.
13. Is encryption expensive?
Encryption can be expensive, but it doesn’t have to be. Some encryption programs are available at no cost. Microsoft EFS, for example, is shipped as part of the Windows operating system . Microsoft also provides whole-disk encryption on Windows 7 systems with a program called BitLocker™ Drive Encryption. Other programs, such as TrueCrypt®, may be downloaded and installed for free. At the other extreme, encryption devices known as hardware security modules (HSMs) can be quite expensive. The choice you make depends on many factors, including encryption strength, speed, available technical support and ease of use.
Other questions discuss encryption technologies, further discussion on encryption keys, loss of encryption keys and the size of encryption keys.
Finally they go into detail about the steps you need to take to begin using encryption and exactly what data should be encrypted.
Again I urge you to read the document in its entirety. It is a very good resource on educating yourself about data encryption. Remember if you encrypt your data it is one less thing you need to worry about.