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All about Encryption

All about Encryption

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Home Page > Computers > Security > All about Encryption

All about Encryption

Posted: Jan 21, 2010 |Comments: 0
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Encryption

Encryption and science and art of writing messages in encrypted form or in code. And part of a field of study that deals with secret communications, used, among other purposes, to:

• authenticate the identity of users;
• authenticate and protect the confidentiality of personal communications and commercial transactions and banking;
• protect the integrity of electronic funds transfers.

A message encrypted by an encryption method should be private, that is, only those who sent and received that should have access to the contents of the message. In addition, a message should be, that is, the person who received it must verify that the sender and even someone who claims to be and be able to identify whether a message may have been modified.

The current encryption methods are safe and effective and based on the use of one or more keys. The key and a string that can contain letters, digits and symbols (such as a password), and and converted into a number, the methods used to encrypt and decrypt messages.

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Currently, cryptographic methods can be divided into two broad categories, according to the type of key used: a single key cryptography and public key cryptography and privacy.

What is encryption of unique key?

A single key cryptography uses the same key to both encode and decode messages. Although this method is quite efficient in relation to the processing time, ie the time taken to encode and decode messages, the main disadvantages is the use of a secure environment for the key can be shared between persons or entities wishing to exchange encrypted information.

What is cryptography of public and private key?

The public key cryptography and private uses two different keys, one to encode and decode messages to another. In this method each person or entity has two keys: one public, which can be freely disseminated, and one private, which must be kept secret by its owner.

Messages encoded with the public key can only be decrypted using the corresponding private key.

Be the example, where Joseph and Mary want to communicate confidentially. So they have to perform the following procedures:

1. José encodes a message using the public key of Mary, which is available for the use of any person;

2. Once encrypted, José sends the message to Mary, through the Internet;

3. Maria receives and decodes the message using its private key, and that only their knowledge;

4. If Mary want to answer the message, you must perform the same procedure, but using the public key of Joseph

Although this method has much lower performance compared to processing time, when compared with the encryption key only, has the major advantage of free distribution of public keys, not requiring a secure environment so that keys are combined in advance.

Moreover, it can be used to generate digital signatures.

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Luis Miguel -
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Luis miguel love software especially the POS Software system. Visit this at POS Software system and see the Pos Software

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A few questions about computer repair “business”?

Question by S: A few questions about computer repair “business”?
A friend (25) and I (20) are thinking about starting to repair and upgrade computers on a more organized level. We have both been fixing computers for friends and family for years, and think that it would be fun to print business cards and try to see how far a small “business” like this would take us.

The situation seems like it would not really be a business, but for lack of a better term I am calling it that. We would print some business cards and attempt to bring in customers by being professional, fast, and less expensive than the large institutions (geek squad). We won’t have a store, but instead we would pick up computers and bring them back to fix in a workshop area in my basement. If needed, we would also make house calls for virus removal, etc.

My questions are:
1) What would we have to do legally to allow us to do something like this? We are in Minnesota. (permits, insurance, taxes)

2) Is it illegal to use free programs such as Spybot for this purpose? (Spybot is an anti-spyware program)

3) Would it seem very unprofessional if we had a phone line that was rarely answered? We both have jobs and school, so most of the time we would work off the messages that people leave.

Neither of us are expecting this to be very profitable, but it is an idea that we want to explore. We have the tools for most basic repairs, so the start up investment lies only with business cards, permits, and insurance.

Thanks for any help, let me know if you need more information.

Best answer:

Answer by sassy2
Get a lawyer. You must form a limited partnership. Lay out all the groundwork between you and friend. Apply for a Sales Tax number.
Then you are off and running. You have a great idea but remember when speaking with customers make the language simple.

What do you think? Answer below!

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Chuck Hamby, Verizon Wireless’ Media & Public Relations Manager for Florida, and Bob Elek, Verizon’s Media Manager in Tampa, chat with Tampa Bay’s Media Talk hosts Janet Sherer and Rob Tiisler about what it means to build one of the nation’s first wide-area wireless broadband networks, deliver one of the nation’s first wireless consumer 3G multimedia services, launch a comprehensive mobile music service worldwide, and claim the highest customer loyalty in the industry based on lowest-in-industry churn.

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Cell Phones and Brain Cancer?

http://www.environmentalhealthtrust.org/
Devra L. Davis, PhD, MPH

Designated a National Book Award Finalist for When Smoke Ran Like Water (2002, Basic Books), Devra Davis is Director of the world’s first Center for Environmental Oncology at the University of Pittsburgh Cancer Institute and Professor of Epidemiology at the University of Pittsburgh’s Graduate School of Public Health. Her recent book, The Secret History of the War on Cancer, was a top pick by Newsweek and is being used at major schools of public health, including Harvard, Emory, and Tulane University. The multidisciplinary Center for Environmental Oncology includes experts in medicine, basic research, engineering and public policy, who will develop cutting-edge studies to identify the causes of cancer and propose policies to reduce the risks of the disease.Dr. Davis’s career has spanned all areas of academia, public policy, and scientific research. President Clinton appointed the Honorable Dr. Davis to the newly established Chemical Safety and Hazard Investigation Board, (1994-99) an independent executive branch agency that investigates, prevents, and mitigates chemical accidents. As the former Senior Advisor to the Assistant Secretary for Health in the Department of Health and Human Services, she has counseled leading officials in the United States, United Nations, World Health Organization, and World Bank. She also served as a Lead Author of the Intergovernmental Panel on Climate Change—the group awarded the Nobel Peace Prize in 2007.Dr. Davis holds a B.S. in physiological psychology and a M.A. in Sociology from the University of Pittsburgh. She completed a Ph.D. in science studies at the University of Chicago as a Danforth Foundation Graduate Fellow and a M.P.H. in epidemiology at the Johns Hopkins University as a Senior National Cancer Institute Post-Doctoral Fellow. She has also authored more than 170 publications in books and journals ranging from the Lancet and Journal of the American Medical Association to Scientific American and the New York Times.Honored for her research and public policy work by various national and international groups, she is member of both the American Colleges of Toxicology and of Epidemiology. She was honored by the Betty Ford Comprehensive Cancer Center and the American Cancer Society with the Breast Cancer Awareness Award, commended by the Director of the National Cancer Institute for Outstanding Service, and has recently been appointed a Global Environmental advisor to Newsweek Magazine.She recently was the recipient of a Women’s Leadership Exchange Compass Award, presented by OPEN: The Small Business Network from American Express, for breaking the paradigms of how women are perceived over the last ten years.

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2008 All Rights Reserved

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