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I've met many people, both in the real world and via my online socialising, that have been fooled by this misconception that a proxy server can provide you with some privacy.  Although I say it is a mistake, there is some small element of truth, perhaps just enough to be dangerous.

For let's remember what a proxy server is and then examine the real attacks on your privacy.   A proxy server sits in between you and the web sites you visit, it does protect these web sites from detecting your location and IP address but only when they are configured correctly.

But now the real big problem with proxy servers, they do actually create another security issue when your surfing.  Compare the proxy server with a helpful man you met on  the street, this man has offered to take care of all your correspondence.  He will pick up all your mail from the post office, and also deliver all your mail  directly himself.  In truth you are absolutely trusting this person implicitely with all your mail,  which is exactly what you do with a proxy server.

The proxy contains every single request you make online, unless it's logs are purged it contains a complete list of all your browsing.  What is perhaps worse that all your usernames, account names and passwords also pass through this proxy.  

Do you trust the administrator of the proxies you use online?

Of course most people who use free anonymous proxies, or the alleged secure elite proxies have no idea who is running them.  It could be a spotty 13 year old linux geek, a Russian Identity Thief or a bored student playing with proxies.  Whoever they are, you hand them control of all your browsing and online data.

It's a sobering thought and one that is not tempered by the knowledge that the majority of our web browsing is conducted in clear text.  No encryption, no secure transfer just lines of clear readable text flying across the ether.  You see dear readers, HTTP the preferred protocol for using the world wide web uses plain text, it uses it for speed and security is simply not a consideration.

So I urge you to be wary of the promise of security that thousands of web sites offer via their web proxy.   The pages of IP addresses of 'elite proxies' available for free should be viewed with utmost caution.  A central goal to being secure online is to minimise the number of people with access to your data, using a proxy does precisely the opposite.

If you'd like to read more about staying secure online, then please come and read my blog based on anonymous surfing I hope it will help you understand the issues and the opportunities !

Article Source:http://www.articlesbase.com/security-articles/a-proxy-provides-privacy-but-only-in-your-dreams-1768336.html

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.

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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Article Source:http://www.articlesbase.com/security-articles/encryption-1762093.html

Ethical hacking involves computer and network professionals who use their expertise to safeguard the networks of an organization on behalf of its owners. In order to test a security system, they seek vulnerabilities that a malicious hacker could exploit. Ethical hacking is also known as penetration testing, intrusion testing, and red teaming. An ethical hacker is sometimes called a white hat while the other one is called black hat. Ethical hackers collect and assess information on issues like loopholes which are truly a security threat, the depth to which a hacker can get into via one of these holes and the patching requirements in order of priority.

The ethical hacker aims to help the organization take anticipatory measures against malicious attacks by attacking the system himself; all the while staying within legal limits. The most important point is that an Ethical Hacker has authorization to probe the target. The reason is that as technology advances and organizations depend on technology increasingly, information assets have evolved into critical components of survival and need to be protected at any cost.

Need for Ethical Hacking

As network security assumes significance for businesses and investment in security infrastructure grows by the day, the need to validate the knowledge and skills of network security professionals has also grown proportionately. If hacking involves creativity and lateral thinking, then vulnerability testing and security audits will not ensure a foolproof network security of an organization. To ensure that organizations have adequately protected their information assets, they must adopt the approach of 'defense in depth'. In other words, they must penetrate their networks and estimate the security posture for vulnerabilities and exposure.

What we do?

In the present times, where network security assumes utmost importance for businesses around the globe, teaching "hacking" as a legitimate means of training students in how to protect a future employer's data assets has been introduced into courses with increasing frequency. MetaWing comes up with a short term professional courses designed for young engineering minds on IT security and Ethical Hacking. We offer courses in Ethical Hacking and allow training professionals to undertake an attempt to penetrate networks and/or computer systems using the same methods as a Hacker. The course is designed to imbibe in you the skills for advanced security concepts. The students pursuing this course are also able to prevent hacking and other forms of cyber crimes. It helps you to find out e-business solutions and execute security policies. It also teaches the students to trace real network security threats and come up with remedies by using firewall systems.

Vaibav gupta
mob. no. 9811747801

Article Source:http://www.articlesbase.com/security-articles/ethical-hacking-training-1759637.html