Wearable Tracking Gadgets with Raspberry Pi

Symantec added tracking gadgets with Raspberry Pi.

Are you whiling the time away until you get your first smartwatch or preparing to run to the local store to buy the latest fitness tracker?

If so, you may wish to know that snoops can track such devices and at a fraction of the prices you will be paying for the latest in wearable tech.

People who use wearable gadgets to monitor their health or activity can be tracked with only $70 (£40) of hardware, research suggests.

The security firm Symantec took a Raspberry Pi and added components including a Bluetooth 4.0 adapter, SD card and battery pack. All-in, the home-made tracker cost around $75 which is about £44/56 Euros.

The company took a number of such devices to busy public locations in both Switzerland and Ireland, as well as a major sporting event, and ran them in passive mode. By simply scanning the airwaves for signals broadcast by wearables, the Raspberry Pi were able to successfully track each and every one of them via their serial numbers or a combination of other factors, prompting the researchers to say:

“In our testing, we found that all the devices we encountered can be easily tracked using the unique hardware address that they transmit. Some devices (depending on configuration) may allow for remote querying, through which information such as the serial number or a combination of characteristics of the device can be discovered by a third party from a short distance away without making any physical contact with the device.”

The researchers also delved further into wearable tech and the associated apps, looking for other potential security and privacy concerns, and it found several.

Symantec discovered that 52% of the self-tracking apps it examined did not have a privacy policy which, it says, may suggest that the developers do not take security and privacy as seriously as they perhaps could.

Researchers also discovered a large amount of unintentional data leakage with the average app contacting 5 domains (one even contacted 14 domains) in a short period of time. Whilst there may be legitimate reasons for a fitness or other tracking app to contact a number of domains for the transmission of data or to serve ads, for instance, Symantec said that the number of domains being contacted increased the risks of data leakage through human error, social engineering or careless or malicious handling of data.

The researchers also discovered other concerns, such as weak session management, which could lead to session hijacking, which could in turn lead to further problems.

Symantec’s blog post ends with the company pointing out that self-tracking apps and devices are not synonymous with privacy and suggesting that those who value their privacy will not get involved in self-tracking in the first place.

However, knowing that many users will continue to use fitness trackers, smartwatches, etc., regardless, the company offers up the following tips which I would describe as being little more than damage limitation rather than a security solution:

*Use a screen lock or password to prevent unauthorized access to your device

*Do not reuse the same user name and password between different sites

* Use strong passwords

*Turn off Bluetooth when not required

*Be wary of sites and services asking for unnecessary or excessive information

* Be careful when using social sharing features

*Avoid sharing location details on social media

*Avoid apps and services that do not prominently display a privacy policy

*Read and understand the privacy policy of app and services

*Install app and operating system updates when available

*Use a device-based security solution if available

*Use full device encryption if available

In addition, a investigate group looked during a apps compared with some activity monitors or that use a smartphone to accumulate data. About 20% of a apps Symantec looked during did zero to blear information being sent opposite a net even yet it contained critical ID information, such as name, passwords and birthdate.

“The miss of simple confidence during this turn is a critical repudiation and raises critical questions about how these services hoop information stored on their servers,” pronounced a Symantec team.

Further review suggested that many apps did not do adequate to secure a thoroughfare of information from users behind to executive servers. In some cases it was probable to manipulate information to review information about other users or pretence databases into executing commands sent by outmost agents.

“These are critical confidence lapses that could lead to a vital crack of a user database,” pronounced a team.

Wearable Tracking Gadgets with Raspberry Pi

Learning C Programming Lesson 8 Arrays

C programming language offers a data structure named the arrays , which could store a fix-size consecutive assortment of basics of the similar type. An array is usage to store an assemblage of data, but this is frequently more valuable to think of an array as an assortment of variables of same type.

In place of declaring distinct variables, for example number0, number1 …, and number99, you state one array variable for example numbers and usage numbers [0], numbers [1], and …, numbers [99] to signify individual variables. A specific element in an array is retrieved by an index.

All arrays contain of adjoining memory locations. The lowermost address agrees to the first component and the maximum address to the latter element.

An array is a collection of memory situations related by the detail that they all have the similar name and the similar type. To mention to a specific location or component in the array, we state the name of array and the location number of the specific element in array.

Arrays are valuable critters that frequently show up when this would be suitable to have one term for a collection of variables of the similar type that could be retrieved by a numerical directory. For instance, a tic-tac-toe board could be held in array and every element of tic-tac-toe board could easily be retrieved by its location (the upper leftward might be location 0 and lower right position 8). At nature, arrays are fundamentally a way to store numerous values under the similar name. You could make array out of any data-type counting structures and classes.

In C programming, the frequently arising problematic is to handle comparable types of data. For instance: If the user wants to accumulation marks of 100 pupils. This could be done by generating 100 variables separately but, this procedure is somewhat tedious and unviable. These sorts of problem could be controlled in C programming by arrays.

Presume you declared array of 10 pupils. For instance: arr[10]. You could use array associates from arr[0] toarr[9]. Nonetheless, what if you need to use component arr[10], arr[13] etc. Compiler might not show fault using these components but, might cause fatal error throughout program execution.

For More Details Please Watch This Video:

Learning C Programming Lesson 8 Arrays

Learning C Programming Lesson 7 Converting Variables

There might be times that you get a file that has numerous (or all) of the variables definite as strings, which is, character variables.

The variables might comprise numeric values, nonetheless if they are distinct as type string, here are very insufficient things you could do to examine the data.  You could not get means, you could not do a regression, you could not do an ANOVA, etc… Occasionally the data set comprises numerical values that are deposited as strings. We would address this situation first. Then we would address the situation where the string variables really contain strings, and the objective is to assign every value the string receipts on to numeric value.

Nowadays that we distinguish the Converting Variables are string variables, we could use the list command to understand what the strings deposited in these variables look similar. Though the variable discipline is distinct as str2, you could see from the list that this contains only numeric values. Even so, since the variable is defined as str2, Stata could not perform any sort of numerical examination of the variable discipline. The similar is true for variable read.

One technique of converting numbers deposited as strings into numerical variables is to usage a string function named real that interprets numeric values stowed as strings into numeric values Stata could recognize by itself. The main line of syntax states in the dataset. The second produces a novel variable read_n that is equivalent to the value of number stowed in the string variable recite. The real(s) is the function that interprets the values detained as strings, wherever s is the variable comprising strings.

A second technique of achieving the similar result is command destring. Let us try utilizing the destring command and see how this works. The main line of syntax loads the dataset yet again, so that we are beginning with a dataset comprising only string variables once more. Second line of syntax functions the destring command.

As you could see from the describe command, the destring command transformed all of variables to numeric, excluding for race, gender and schtyp. Meanwhile these variables consumed characters in them, the destring command leftward such variables unaccompanied. If there were any numeric variables in dataset, they would continue unchanged.

Learning C Programming Lesson 7 Converting Variables

Keyword Density For Best SEO Practice

Keyword Density is the most important factor of that impact on Search Engine Optimization.What is the perfect Keyword Density ? That’s the question which question have no any accrued perfect answer,because the main reason is Google and also main search engines update or maintain their algorithm with very strongly complex mathematical calculation which calculation that’s very upon different site and key phrase.

Is in there have SEO tips or tricks for checking safe keyword density check? Yes,i am also recommend SEO Checker to check your website Keyword Density and SEO Score.You can using this tools for improving your other tags and on-page optimization.

Best And Perfect Keyword Density Calculation

Example: Find the Website has 100 overall words and the Key word decided on is usually.

• Google

Let Assume the word “Google” present 2 times on the html document. So, the Optimal Word Density calculated from below strategy,

(Keyword presence / total words) * 100

This is the main strategy for Density, keyword having single word value. So right now the density is (2 / 100) * 100 = 2%

Best and Optimal Keyword Density for single word: 2% to 4%

Now Consider the Keyword is three words that is Key Phrase

• Google Keyword Density

So the strategy is different and also it’s used as a generic strategy for both if it’s a single word or Key Phrase.

(Keyword presence / total words) * 100 * Key Phrase word count

It’s a 3 word so the Key Phrase word count is 3.

Let assume the Key Phrase present 2 time so Keyword Density is going  (2 / 100) * 100 * 3 = 6%

Due to Keyword Stuffing the Keyword ratio is checked more deeply. The Phrase is having 3 words Consider the 3 Words are Presence and Density ratio as follows,

1. Google – 4 times – 4%


2. Keyword – 2 times – 2%


3. Density – 3 times – 3%

Just about all preceding divide expression rate was in Maximum Density selection because without a doubt we now have looked in regards to the Excellent one term solidity. Keyword and key phrase is actually Increased Importance compared to array of 2% in order to 4% which means this is recognized as as Search phrase filling solely and so position your entire Phrase additionally throughout Finest relation.

Very best and also Maximum Occurrence intended for Keywords and phrases: Keyword and key phrase in addition to all divided words are generally 2% for you to 4%.

Greatest Practice of Protected Key word Collection and also Functionality

If you would like possibly be finest and also risk-free in this On Page Search engine optimization your site need to comply with this bellow principles

• Keep the whole phrases relation within the web site involving 2% to be able to 4%.


• Tend not to decide on sole term Pick Concept Key phrases that provides you with additional google search impressions in different word formations


• Employ word alternatives of the words you have chosen


• Enhance your title, h1, image alt tickets using the keyword and key phrase

Expect this might give you a number of Superior SEARCH ENGINE OPTIMISATION Idea to suit your needs regarding the Optimal Search phrase Denseness rate and also Usage.

Note: 

We have been definitely not advised to utilize that particular percentage mainly this specific relation will probably be employed around finest search engine optimization individuals.

Look for available your competition as well as boost ones key word prefer that. Retain the item in this particular Secure Key word Solidity relation after that you are not think about as a Spammer therefore employs this specific and maintain your web site fresh and also legitimate regarding Search engines like google.

Keyword Density For Best SEO Practice

Sewing an invisibility cloak with lasers

Invisibility cloaking is already a reality, but don’t expect it works just like in Harry Potter.

The idea of invisibility has fascinated people for millennia and has been an inspiration or ingredient of myths, novels and films, from the Greek legend of Perseus versus Medusa to H.G. Well’s Invisible Man and J.K. Rowling’s Harry Potter.

For the past decade or so, extremely promising advances have been reported. Using either metamaterials – artificial materials with properties typically not found in nature – or natural materials, scientists have devised all sorts of invisibility cloaks. All of these work, yet all of them are flawed in one way or the other. They render an object invisible only from one angle or only for a particular set of frequencies like microwaves and so on. In order to make a perfect invisibility cloak, one needs extremely advanced manufacturing methods. Scientists at University of Cambridge have devised a breakthrough technique that will allow us to build materials previously unavailable, including those that could be used to build invisibility cloaks – the genuine kind.

Cambridge University researchers used laser light as “needles” to sew nanoparticles into materials that can be used to make invisibility cloaks.

The study, reported overnight in the journal Nature Communications, is part of the quest to develop metamaterials that contain nanoparticles smaller than light waves.

The theory is that objects made of these artificial materials can reverse the arrangement of light that bounces off them, making them look like something else or rendering them invisible.

“We have controlled the dimensions in a way that hasn’t been possible before,” said co-author Ventislav Valev, a Bulgarian-born physicist and science-fiction buff.

Light really only does one of two things when it hits an object — it can be reflected or absorbed. When you look at a surface, the color you’re seeing is the light that is reflected off its surface. To make something “invisible” all you really need to do is wrap it in something that makes light behave in a different way (as if that’s an easy thing to do). There are a variety of promising nanoparticles that may be able to refract light in unusual directions, making them essentially invisible, but assembling those into a metamaterial has been virtually impossible until now.

Metamaterials might be the way to develop cloaking technology, but it has potential in a wide variety of more practical (and less sexy) uses. For example, some metamaterials could absorb certain very narrow wavelengths of the electromagnetic spectrum while reflecting others, making them ideal for use in sensors and scientific equipment.

Laser Thread whatever you’re going to use a metamaterial for, you first have to build one, and the nanoscale construction method developed by the University of Cambridge team has the potential to make that possible. The lasers being used are unfocused and produce billions of tiny needles of light that line up gold nanoparticles in long strings. The strings can then be stacked on top of each other to make larger pieces, eventually leading to a macroscopic scrap of the desired metamaterial. [Read: The wonderful world of wonder materials.]

It’s not as easy as flipping on the laser and watching the nanoparticles string themselves together, though. The particles have to be electrically connected to join up into a proper metamaterial strand. To get everything lined up, the team used spacer molecules called cucurbiturils (CBs). These hydrocarbons form a scaffold that keeps the particles just the right distance apart so that ripples of electrons can flow along the surface of the chain (this is called a plasmon). The plasmons concentrate laser energy on the particles and reinforce billions of nanoparticle connections simultaneously.

This is only the first step towards building metamaterials that not too long ago would have been deemed impossible. Before invisibility cloaks can become a reality, scientists must work out how to make the right materials at a microscopic scale. The scientists say light holds promise as a way of triggering the assembly of nanomaterials because of its speed and “highly tunable interaction with matter”.

Sewing an invisibility cloak with lasers

Google Keyword Planner Tools (Keyword Tool)

The search engines Keyword planner formerly referred to as because The search engines Keyword tool which facilitates to discover the Search Number of the actual Keyword in past times several years.

We can in a position to uncover simply how much Lenders considering the Key terms Seek.

And yes it delivers specifics of your Advertiser Rivalry along with biding Benefit to the Search term and supplies much more Suggession Key terms. Which will helps to focus on essentially the most researched keywords and phrases and acquire far more site visitors via researches. It can be incorporated to be able to Adwords Currently.

Google keyword planner is the most powerful keyword tools.

Google Keyword Planner Link : https://adwords.google.com/KeywordPlanner

Google Keyword Planner Tools (Keyword Tool)

Most Important 3 Website Ranking Fact

Web site Rank is utilized by Search engines along with all the other search engines like google to display it can be search results for every research issue. Could rank will be the only way in order to fix plenty connected with data depends on several top priority.

Consequently, Each search engines like yahoo utilized several own algorithms, standing components and also supplements to obtain the lookup outcome. This particular metrics can ascertain the website Rating of website page.

Purpose Of Website Ranking

Now daily, there are an incredible number of Websites easily obtainable in the online world for each and every search dilemma. Search results purpose is usually straighten out the perfect printed web pages with regard to individual tapped out research issue. For that reason, Each Google search having it is own position metrics as well as Algorithms to kind the actual research effect.

Nevertheless, huge amount of listings will probably needed more advanced protocol to find out greatest harmonized webpages. Thus, each search engine barely attempting to enhancing their net Rating metrics although, Yahoo could be the only search engine received good results regarding long time period in the lookup area.

Precisely how Internet website Rankings tend to be scored?

Each and every site World-wide-web Rank can defer simply by merchant just like (Google in addition to more) each vendor having different factors, measurements and site facts. And so, the actual ranking ought to fluctuate is dependent upon this rank providers.

Without having web page seller authorization it’s challenging to get the accurate information concerning web page visitors details. Site visitors additionally takes on a vital purpose to help computing your position from the website. Site visitors particulars usually are the key factor which makes additional variation with this rating.

Here is the List of factors that matters most to calculate this ranking

• Page Quality


• Page Quantity


• Other Quality and relative website Links to the Page


• Proper SEO


• How long the Page available


• User experience about the Page

The above mentioned number will be the most typical SEO Factor which are employed by many sellers to be able to status the web site. Also there are numerous invisible variables which might be unknowable.

Top Most critical rankings we need to need to learn

We know there are many website ranking instruments as well as web-sites can be purchased. Everybody can be employing to produce to be able to determine the actual position.

We have to locate what exactly is important most crucial to get within the initial web site associated with The search engines look for mainly because that is the rank we should boost. Thus, right here is the report on Web site Ranking you must need to know just click the start press button for you to investigate more concerning this write-up.

Most Important 3 Website Ranking Fact