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Until recently, people used a technique called symmetric key cryptography to secure information being transmitted across public networks in order to make voip shopping more secure. This method involves encrypting and decrypting a voip message using the same key, which must be known to both parties in order to keep it private. The key is passed from one party to the other in a separate transmission, making it vulnerable to being stolen as it is passed along. With public-key cryptography, separate keys are used to encrypt and decrypt a message, so that nothing but the encrypted message needs to be passed along. Each party in a voip transaction has a *key pair* which consists of two keys with a particular relationship that allows one to encrypt a message that the other can decrypt. One of these keys is made publicly available and the other is a private key. A voip order encrypted with a person's public key can't be decrypted with that same key, but can be decrypted with the private key that corresponds to it. If you sign a transaction with your bank using your private key, the bank can read it with your corresponding public key and know that only you could have sent it. This is the equivalent of a digital signature. While this takes the risk out of voip transactions if can be quite fiddly. Our recommended provider listed below makes it all much simpler. voip
It's always good to be familiar with the reputation of any voip company you're dealing with. To find out more about a company most voip websites have an ABOUT US section which will tell a little about the organization. Government agencies also monitor the activities of voip companies to ensure that the goods and services they provide are acceptable to consumers. When you decide to purchase voip online check out the CONTACT US section of the voip website to ensure that you can actually contact them by phone, fax or email. Reputable firms will most certainly carry this information. Right, Work Out, Sleep Better by: ARA Content
The Three Components of a Healthy Lifestyle (ARA) - In today's fast-paced world, moving at full speed isn't an option, it's a way of life. Finding the energy to keep up has led many Americans to improve their diets and increase their activity and exercise. Yet many people are missing the third vital component to a healthy lifestyle -- a good night's sleep. "Committing to improving overall health requires ambition, focus and knowledge," says women's health researcher Joan Shaver, Ph.D., RN, professor and dean of the College of Nursing at the University of Illinois at Chicago. "We should think of a healthy lifestyle as a triangle, with the three points of proper nutrition, exercise and sleep. If we fail to fulfill any one of these points, we are missing the potential for optimum health." Good nutrition and exercise The requirements of eating a balanced diet will vary from individual to individual, but it is vital that all major food groups are included. Many of today's diets may help improve weight loss, but often leave the body begging for vitamins and other essential nutrients. Eating a diet full of fruits, vegetables, breads, and fibers will help to give the body more energy for exercise and taking on the events of a busy day. "Getting in shape" means exercising at least three days a week for 30 minutes or more -- not necessarily all at once. Exercise doesn't have to be boring or rigorous -- it can be as simple and fun as a morning walk or an evening bike ride. In fact, yard work is considered a great workout and long summer days allow for plenty of time outside. Since exercise will raise the body's temperature and heart rate, be sure to complete exercise at least three hours before bedtime to allow the mind and body to wind down. Better sleep According to Dr. Shaver, several lifestyle factors must be considered to benefit from a better night's sleep. First, evaluate the sleep environment -- ensure that your room is cool, dim and quiet. Reserve the bedroom for sleep -- avoid bringing work to bed or watching television in the bedroom. Next, allow enough time for sleep -- on average, the National Sleep Foundation (NSF) recommends eight hours for adults. But, in the 2002 NSF "Sleep in America" poll, 39 percent of respondents said they were sleeping less than seven hours at night on weekdays. And most only slept 7.5 hours on the weekends. Finally, ensure that each sleep partner is comfortable by finding a mattress that meets individual needs. According to the NSF, 91 percent of people say their sleep surface is important in helping them get a deep, restful night's sleep. And 89 percent of those surveyed in 2002 agree that a better quality mattress provides a better night's sleep. One alternative to traditional innerspring mattresses is The Sleep Number Bed by Select Comfort. It allows individuals to adjust the bed to their ideal level of personal comfort -- their Sleep Number. A Sleep Number is a number between zero and 100 that represents each individual's ideal setting for mattress firmness, comfort and support. With dual-adjustable air chambers, sleep partners can independently adjust the firmness on their side of the Sleep Number bed without disrupting their partner's desired comfort level. Kevin Garnett, professional basketball player for the Minnesota Timberwolves, has recognized the importance of sleep on his overall performance as a professional athlete and has taken personal sleep comfort to a new level. In 2001, the 6-foot, 11-inch forward ordered a custom-made 9-foot by 9-foot, dual-adjustable Sleep Number bed from Select Comfort. "The Sleep Number bed has helped me sleep through the night when my muscles ache after a hard workout," says Garnett. "With a regular mattress you have to adjust your body to the bed. The Sleep Number bed allows you to adjust the bed to your body." In studies conducted at Stanford University and Duke University, participants fell asleep faster and experienced better quality, more restorative sleep on the Sleep Number bed than on a traditional innerspring mattress. Stanford University researchers also found that 87 percent of those who slept on the Sleep Number bed experienced a greater percentage of REM sleep with fewer disturbances. The Sleep Number bed also provides more proper spinal alignment and 93 percent of participants reported back pain relief. For more information about these or other sleep facts, visit www.selectcomfort.com. To find out more about the Sleep Number bed, call (800) 535-BEDS.
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