Crittografia per tutela privacy su Internet

Forbes consiglia una serie di strumenti:

1. Email Privacy – Per invio di email sicure Pretty Good Privacy (PGP) è un programma che permette di usare autenticazione e privacy crittografica. Il più usato al mondo. Una versione web based compatibile con il sistema PGP è Hushmail. Queste 2 applicazioni se usate correttamente offrono comunicazioni sicure.

2. File Privacy – Per proteggere i files il programma per eccellenza è TrueCrypt, si possono proteggere cartelle complete ed anche intere unità, offre sincronizzazione con Dropbox. BoxCryptor è un altro strumento che facilita la crittografia dei files salvati nella “cloud”, inoltre è compatibile con Android e iOS. Se questi strumenti applicano la crittografia a livello locale, per una protezione a livello online che offrono backup e sincronizzazione ci sono SpiderOak e Wuala.

3. Privacy su comunicazione voce – Le intercettazioni via voce sono sempre più diffuse, dal creatore di PGP di sopra, Zfone è un programma di telefonia VoIP sicuro, utilizza un protocollo chiamato ZRTP che permette di effettuare telefonate sicure su internet. Altro sistema con protocollo ZRTP è Jitsi che offre sicure video chiamate, così come sicure conferenze, chat e condivisione desktop. A causa di problemi di sicurezza e di intercettazioni legittime si consiglia di utilizzare questa applicazione al posto di Skype. Per dispositivi mobili sempre con ZRTP, RedPhone permette comunicazioni crittografate su Android.

4. Chat Privacy – Per sessioni chat o di messaggistica istantanea abbiamo Cryptocat che non è soggetto a sorveglianza commerciale o di governo. Altro simile esistente da molto èOff-the-record Messaging (OTR) che offre chiavi private per comunicazione autentiche e segrete. E’ anche disponibile come plugin Pidgin.

5. Traffic Privacy – Importante è la tutela della privacy su informazioni geografiche. Con le reti VPN possiamo navigare anonimamente e mascherando gli indirizzi IP. Una lunga lista di VPN si può trovare all’indirizzo http://en.cship.org/wiki/VPN. Ci sono sia gratuite che a pagamento. Infine si ricorda il progetto TOR più volte segnalato per navigare sicuri via internet.

Fonte: Tracce Web

Link building for effective search engine optimization

When you begin the task of acquiring quality and relevant backlinks to your website there are many factors that can increase or decrease your search engine rankings. This article outlines the difference between good and bad backlinks.

A quality backlink pointing to your site should be in the same category and relevant in content to your website. The page where your link is located should be indexed by Google and the page should also have a Google page rank. The webpage where your link is located should also contain no more than 30 other out-going links to other websites. Link pages with more than 30 out-going links are less relevant to the search engines. Having your link posted on this type of webpage can affect your search engine rankings in a negative way. Other excellent techniques of acquiring backlinks are directory submissions, posting articles, blogs and forums. 

For directory submissions select the proper directory category and take a look at how many other websites are contained in the category where your link would be posted, if you can manage to get on the first or second page of the listings, this is a quality backlink. Also look at the Google page rank of the landing page for your link. If the page has a Google page rank this is also a quality backlink.

Stay within your category, relevant content is very important to the search engines. Write an article preferably relevant in content to your website and submit the article to high quality article directories. Blogs are an excellent way to get quality one-way backlinks, Blog sites also receive tons of traffic, which in turn give your site more exposure. Posting your link on forum pages is also an efficient method of aquiring backlinks instantly.

Backlinks to avoid would be a zero page ranked webpage, especially if the home page has a zero page rank. Links posted within framed webpages which will also steal your traffic. Especially avoid link farms, webpages which contain more than 100 unrelated outgoing links, This type of link page is frowned upon by many major search engines. Avoid Webpages with mirror sites containing the exact same content with a different URL, also pages that utilize redirects and URL cloaking. Never post your link on a webpage that contains a "no follow" or "no index" robots meta tag within the source code. Dynamic websites with question marks in the URL should be avoided because they are not always indexed by the search engines.

Avoid posting your link on a page that opens very slow or contains mostly ads and flash banners. Try not to aquire or purchase great numbers of backlinks in a short period of time, backlinks should be accumulated gradually. Also avoid webpages and directories that list their results in alphabetical order, as their database increases your link could be moved to a less relevant page with less pagerank. Quality backlinks are one of the most important factors involved in the process of acheiving high search engine ranking.

Article written by the CEO of www.submit-site.org
Article Source: http://www.ArticleGeek.com - Free Website Content

The Truth About Aged Domains

Domains that have been registered and not ever dropped are called "Aged Domains".

These domains normally sell for more than a new one because they have been around for a while. They're usually out of the Google Sandbox and for those who are looking for aged domains with a history, it can help them make a living online or raise credibility in their niche markets simply because if the domain has been around for years, it appears that they have as well.

Aged domains can also be found on forums like DNForum.com and simply by typing in the keywords "Aged Domains" into the search bar you can easily locate domain auctions that include these older domain names.

I have purchased dozens of domain names for $40 or less that were anywhere from 5 - 10 years old. Just based on the age alone I was able to flip these domain names for over 5x what I paid.

For instance, one domain name I purchased wasn't ever used, meaning it hadn't featured a website on it. It just sat parked in the users account for over six years. 

I purchased the domain for only $30.00 and because of its age, I was able to flip it for $379.00. 

That's quite a boost in profít from a domain I paid so little for. 

While there is no exact science on how to flip domains here are a few things to keep in mind: 

1) Development Potential

When you analyze the availability of domains in your list, consider what each domain name could represent and be used for when creating a website presence.

An example of which is whether the domain name is one that could represent a product title or better serve as a personal portfolio, a social community, a directory or perhaps a forum.

While it is unlikely that the purpose of the domain name will match your ideas when it is sold, thinking of a clear purpose for each domain name will not only help you make sound choices during the selection process, but it can also be included in a domain auction as a way of passing on ideas to prospective buyers.

2) Length

It cannot be said enough - most of the domain names you purchase should be relatively short, basically consisting of two words.

3) Trademark Issues

Avoid registering any domain names that could infringe upon the trademark of existing companies. Whether or not you believe that the company will take action shouldn't be considered.

The last thing you want is to purchase a domain name that is unable to be sold due to buyers being cautious or concerned of building a website on a domain that ends up being seized by a company wishing to protect their identity.

4) Relevant / Popular Keywords

Does the domain name contain popular keywords that are used by those seeking out more information in search engines? If so, your domain name just increased its value instantly.

One of the easiest ways to determine whether a keyword is a common one is by using the free service available at www.SEOBook.com or Keyword Discovery.

5) Existing Traffic

If you are purchasing aged or recently expired domains, you will want to determine whether there is existing traffic to the website or not, thus increasing its value immensely.

Organic, natural traffic sent directly from search engines is the best kind, however, back links from other websites are also very important to potential buyers.

An easy way to determine the number of backlinks as well as page rank and other important information is by visiting www.CheckPageRank.net where you can enter in domain names and retrieve useful data relating to the name itself.

When it's time to register your domain names, you can use any registrar that you wish.

Personally, I use www.TLDwebshop.com , a favorite among domain buyers and sellers. Regardless of the registrar you choose, you will want to make sure that you park them on service sites such asAfternic.com or Sedo.com so that you are able to generate revenue while you are preparing to sell the domain itself.

6) Spelling

Is the domain name easy to remember? If your customer purchases the domain and builds a business with this name, will he be able to easily brand it?

For example, domain names with double letters in them such as www.cashhour.com may often be mistaken for www.cashour.com. Keep in mind that domains with odd spellings, hyphens or numbers would have to be clearly spelled out, or explained, when someone is attempting to promote their website through word of mouth, rather than in print.

Consider this when registering domain names and make sure that the names you choose will not be mistaken or misspelled by potential customers of yours or the person purchasing it from you who will experience a significant loss in perceived value.

When choosing your domain names, there will be many factors that come into play - the type of audience you are offering to, the auction sites you are featuring them on, the price range you are expecting and so on.

There is no 'one way' to do this, and you will need to learn to become a better domain evaluator (and purchaser) through hands on experience. Using the guidelines above, however, will help you maximize your efforts and minimize your costs (and losses).