|
Friday, 20 November 2009 |
By backupvault2 backupvault
 Cloud computing what does it mean? The word computing is well understood by everyone these days, but what does cloud stand for? Cloud computing represents a paradigm shift in the concept of business computing as done at present. According to Wikipedia, Cloud computing is Internet ("cloud") based development and use of computer technology ("computing"). In simple terms it means running hosted services over the internet. Yet cloud services differ from traditional hosted services on several factors. Cloud computing allows a company to pay for only as much capacity as it needs and the user requires no more infrastructure than a computer and an internet connection. Using cloud services clients can use applications without installation and access their personal files. This technology has made possible much more efficient computing by centralizing storage, memory, processing and bandwidth. Marked improvement in server virtualization, distributed computing and high-speed internet have contributed to the birth of cloud computing technology. A cloud can be private or public. A public cloud sells services to anyone through the Internet. A private cloud is a company network or a data center that offers |
|
Read more...
|
|
|
Thursday, 19 November 2009 |
By backupvault2 backupvault
 A Directory Harvest Attack or DHA is a spammers technique to find out valid e-mail addresses at a domain by using brute force. The spammer builds up a huge list of likely email addresses using different permutations of commonly used usernames. Emails either blank or containing a single innocent word, are then sent to these addresses. These attacks are more effective for finding e-mail addresses of business houses since they usually have a standard format for official e-mail usernames. There are two variations of this technique. In the first, the list created contains all possible combinations of letters and numbers up to a certain length with the domain name appended to it. This is a standard brute force attack. The other, surer technique is to create a list that combines common first name and surnames and initials. This goes by the name of standard dictionary attack.
The success of a directory harvest attack relies on the fact that invalid recipient addresses are rejected by the recipient e-mail server during the Simple Mail Transport Protocol (SMTP) session. Any address which is accepted is considered valid |
|
Read more...
|
|
|
Wednesday, 18 November 2009 |
By backupvault2 backupvault
 In todays world, electronic mail has become a primary means of communication, in personal as well as in business life. It is an easy, quick and cheap mode of exchanging information. But such a nice and ideal communicating environment has been sullied by the work of some twisted minds in the form of spam, viruses and malware. The degrees of sophistication with which these are created are increasing day by day. If you let one of them sneak in, in no time others follow. Evidences point to the probability of spammers and virus and malware authors working in collusion with each other.
Viruses are created to scan the documents and address books on the hard drive of an infected machine for email addresses found from the "from" details (spoofing). The virus then uses its inbuilt mail server to send itself to every email address it has found as well as relaying the list to the virus writer. If you have ever given out your email address to someone and that person gets infected you will also start receiving virus emails.
E-mail addresses |
|
Read more...
|
|
|
Sunday, 15 November 2009 |
By backupvault2 backupvault
 An often put question is Why do I get so much spam? The answer to this is that you have disclosed your email address to somebody. As almost all private and business communication is done through emails these days, providing your email address can not be totally avoided. Doing so defeats the very purpose of it. Some of the occasions where email address is disclosed are newsgroups, chat rooms, home page, business card, online forums, lucrative offers through emails, subscription services, friends and business associates. Spam and viruses cost online business a few billions of dollars a year. Spammers need email addresses to send spam and also get hold of them through mail relaying, dictionary attacks and viruses like Trojans. Once tour address is in circulation, you cannot avoid spam but can isolate spasm from genuine mails by adopting different strategies. This segregation is done by spam filter. One can install an in-house spam filter or enter into a contract with a hosted anti-spam service.
Selecting an email spam filter that can help prevent spam attacks is tough as many criteria have to be |
|
Read more...
|
|
|
Saturday, 14 November 2009 |
By backupvault2 backupvault
 Apart from virus and spam, an equally, if not more, dangerous threat faced by email users is phising. Phising is an online fraudulent activity that fools a person to provide financial or personal information, which can then be put to use by the perpetrator. Phishers as the creators of phishing are called, snares their victims by building fake replicas of emails and websites, which can pass off as genuine to the unsuspecting mind. When asked to submit financial or personal information like bank account number, credit card number, PIN, etc., the trapped person discloses them.
Although phising is a comparatively new form of fraud, its frequency and success rate is on the increase. It is most effective against less knowledgeable internet users who are ignorant and/or careless to spot potential fraud in their emails. Though phishing is targeted at individuals, it also creates a problem for organizations. If employees are swindled, the company could be held accountable for failing to take measures to prevent it. If a phishing attack impersonating a company is successful, then the company's goodwill and credibility would be affected because it |
|
Read more...
|
|
|
|
<< Start < Prev 1 2 3 4 5 6 7 8 9 10 Next > End >>
|
| Results 73 - 81 of 231 |
