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How to Check if Someone Else is Using Your Facebook Account?

Notice some suspicious activity on your wall? Well there some simple security settings built into Facebook – some of these settings are new while others have been around for some time – that should help you quickly detect if any other person is secretly logging into and using your Facebook account.
Go to Facebook.com -> Account -> Account Settings -> Account Security. Here you’ll see a list of all computers and mobile devices that have logged into your Facebook account and when. You can also see the approximate geographic location of the device, based on the IP address, that was used to access your Facebook account.
If you come across an unknown device / location in the list, say you are Mac user and the device listed is IE on Windows, just click the corresponding “end activity” link and it should immediately log you out from that machine.
For extra safety, you may also choose to receive email and SMS alerts if someone else tries to log into your Facebook account from a previously unknown computer or mobile phone. (I wish Google could bring such a feature to Gmail as well).

How to Hide your Email Address from Facebook Apps

Facebook is home to more than half a million apps and some of these apps would like to know your actual email address before you can add them to your Facebook profile.
For instance, if you are planning to play Farmville or CityVille or any of the other popular games on Facebook, you’ll be required to share your email address with the game developer, Zynga in this case (see the above screenshot).
If you would like to avoid sharing your email address with the developer and yet use their Facebook app, just click Change under “Send me email” and Facebook will offer you a new and anonymous email address that you can share with the app developer.
Any messages sent to this address will still reach your main inbox but your actual email address will stay hidden from the app developer. Also, once you decide to remove the game /app from your Facebook profile, that proxy email address will be gone too. Simple!

Add a Subscribe Button to your Facebook Profile

 

Add a Subscribe Button to your Facebook Profile

Like most other Facebook users, I have a public page where I share updates from my blog and a personal profile which is private and I primarily use it for connecting with my offline friends and family members.
Most of the stuff that I share on my personal Facebook profile – like pictures of kids, songs, cooking recipes, etc. – would be extremely boring to the external world and, fortunately, they don’t get to see any of that.
Having said that, I occasionally post updates on my personal profile page that could be of interest to a wider audience and I would therefore be more than happy if people - who are not my “friends” on Facebook - can see or comment on them. How can you do that without making your profile public?

Let Non-Friends Follow you on Facebook

Facebook has just added a new option to profile pages that would let people “subscribe” to your profile just like the way people follow you on Twitter. Whenever you post an update on Facebook with the privacy set as “public,” it will appear in the news stream of your subscribers.
To put this in more simple terms, Subscribe is to Facebook profiles what Like is to Facebook pages. The only difference is that you get each and update when your “like” a Facebook page whereas you only get public updates when your “subscribe” to a Facebook profile.
You can subscribe to my public Facebook updates at facebook.com/agarwal.amit.

Add the Subscribe option to your Facebook Profile

If you would like to add the Subscribe button to your own Facebook profile, go here. Before you do that, it may be a good idea to double-check that only stuff that you really want to share with non-friends is public.
To confirm, go your Facebook profile page, hit the “View As” button and then click the “public” link to see what updates in your profile are public. You can have unlimited number of subscribers to your profile but you can subscribe to a maximum of 5,000 profiles.
You can download this PDF, courtesy the Facebook Public Figures page, to learn more about the new Subscribe option and how it differs from a regular Facebook page.

On a related note, Facebook is using the standard RSS icon with the new Subscribe feature which is confusing because, technically, these aren’t really RSS feeds – you can’t get them in, say, Google Reader.

Extend the Range of your Wireless Network

Setting up a wireless home network is pretty simple now. Get a wireless router, connect the Internet port of the router to your broadband modem and then connect any of the numbered LAN ports to the desktop computer through an Ethernet cable.
Wireless G (or 802.11g) routers offer fairly good Wi-Fi signal strength but if you plan to transfer large files or stream videos around the house, you may well consider switching to a slightly more expensive Wireless N (or 802.11n) router – these offer better signal strength and higher data transfer speeds than Wireless G routers.
There’s however one problem with Wi-Fi signals emanating from your wireless router – they only have a limited range. The wireless signal strength will degrade as the distance between the router and your laptop increases and it will further weaken if you have too many brick walls in the house or if your computer is located on a different floor than the router.

Ways to Boost the WiFi Signal Strength

 

If you too have a problem getting Wi-Fi signals in every corner of your house, here are some tips (and accessories) to help you extend the range of your wireless network.
#1. Install the DD-WRT* firmware on your wireless router – this might help increase the range of your Wi-Fi router by a few meters if not more.
To increase the signal strength, you can increase the router's transmit power and also disable both frame burst and afterburner (the settings can be accessed from the router's web dashboard). If DD-WRT firmware is not available for your router, try the Tomato firmware on your router.
#2. Most routers have omni-directional antennas so they emit wireless signals in all directions (just like a light bulb).
That’s fine if you have placed the router in a central location but if the router is in some corner of your room or against a wall, consider adding a home-made reflector behind the antennas of your router.
#3. InSSIDer is a free utility that can help you detect the presence and strength of wireless networks. Install InSSIDer on your laptop, walk around the house with your laptop to determine the wireless signal strength at various places and, based on this information, you can quickly find a more suitable location for the router.
#4. Ideally, you should place the router at a height in some central location and away from other cordless devices. Make sure that the router is not placed near something metallic (like an almirah or window grills) as that will weaken the wireless signals. Avoid mirrors as they can reflect the wireless signals away from the desired direction.
#5. Wireless routers generally ship with omni-directional antennas but you can replace them with more powerful uni-directional antennas and that will keep the signal from getting broadcast in all directions.
If you can’t find a compatible directional antenna for your router model, consider a booster antenna that’s omni-directional but will still boost both the range and strength of wireless signals.

Extend the range of WiFi signals with Hardware

If your router is placed on the ground floor of your home, the Wi-Fi signals will be very weak or may not even reach the basement computer or the printer upstairs. The situation will be no different if you work in a fairly large premises or if there are too many walls in the area.
In that case, here are some hardware device that you can consider to extend the reach of your Wi-Fi network:
Option #1. You can attach a WiFi Repeater (also known as Wireless Range Expander) to your router and quickly expand the coverage of your wireless network without using any cables.
The Repeater should be placed within the range of your existing router and it will reflect the signals to other areas where the wireless reception was earlier poor (or totally absent). The Repeater can connect wirelessly to both routers and access points (see #3 below).
Option #2. (This is my current setup) You can get another wireless router and connect  it to your existing router using an Ethernet cable. The advantage is that this setup comes pretty cheap and the Internet speed stays almost the same even for computers that are accessing the web via the new router.
You can get a 100 feet long Ethernet Cable (also known as Cat5 or LAN or RJ45 cable) for less than $10 and wireless routers start at $20.  Here’s a detailed guide on how you can connect two routers together.
Option #3. You also have the option to use an Access Point instead of a router to extend the WiFi range but that’s often not required because Wireless Access Points can be more expensive than equivalent routers.
The other advantage with a router is that is has extra LAN ports so, in future, you can connect more wired computers for sharing files or you Internet connection.
Option #4. If you have an old desktop or laptop computer, you should consider adding  an external (USB based) wireless adapter or upgrade the internal network card to improve the wireless reception (and thus Internet speed).

A Trillion Pageviews for Facebook

Google today released an updated list of the most-visited sites on the web and it should not come as any surprise that Facebook takes the top spot with 870 million uniques. YouTube and Yahoo are next with 790 M and 590 M uniques respectively.
Google, maybe for competitive reasons, doesn’t share traffic data of its own site, or that of Gmail, in the Ad Planner report. Google+ is growing but the user base is still relatively small for the site to become part of this report.

A Trillion Page Views
Facebook hit a new milestone in June this year - the site touched a trillion page views from the 870 million* people who visited Facebook that month. Check this info graphic to get an idea of how big a trillion – or a million million – is.

[*] Officially, Facebook has 750+ million users but the number of unique visitors who flock Facebook every month is much higher because certain section of the site – Facebook Pages and Profiles for example – are open to non-users as well.

Facebook says that people spend over 700 billion minutes per month on the site and now we also know that, on an average, one user visits 1150 pages on Facebook in a month. That’s impressive considering that YouTube, with all the entertaining and viral content, manages only 126 views per unique visitor per month.

A Buying Guide for TV. Here’s What You Should Know?

There are several points to consider before buying a TV. What screen size should you choose? Is LED better than LCD or Plasma TVs? Which ports should you look for in a TV? Is it worth paying extra for networking related features? HD (720p) or Full-HD (1080p)? Which TV brand should you go for? And finally, is 3D necessary?

LCD, Plasma or LED?

There are basically two types of TVs - LCD and Plasma. The other category, LED, is actually a type of LCD but one that is slimmer (looks matters) and consumes less electricity than regular LCDs. I haven't had a chance to compare the picture quality of equivalent LED, LCD and Plasma HDTVs side-by-side but most online material seem to suggest that Plasmas offer the best picture quality.

The other point in favor of Plasma HDTVs is the viewing angle. LCDs and LEDs are best viewed from the front but if your room’s seating arrangement is such that people may have to watch TV while sitting at either sides, Plasmas may be a better option as the have a wider viewing angle. That said, if your TV room is brightly-lit or has too many windows, the Plasma screen may carry glare or reflection. LCDs have a matte screen and thus don't have the reflection problem.

Size of the TV Screen

HDTVs are available in various sizes and the one you should choose depends on two factors - the length of your room and obviously your budget.

As a rule of thumb, the ideal size of the TV screen should be anywhere between .3x and .6x where x is the distance between your sofa and the TV. For example, if the viewing distance is 6 feet (or 72 inches), you can go for a 24" - 48" screen.

TV Input Ports

Most newer TVs have HDMI and USB ports but what's also important is the location of these ports. If you are planning to wall-mount the TV, make sure that there are enough free ports at the sides of the unit because, once you mount the TV, it will be inconvenient, or rather impossible, to use the back ports for connecting your gadgets to the TV.

Screen Resolution – 720p, 1080i or 1080p

The next factor is the screen resolution where your choices are 720p, 1080i and 1080p - also known as full HD. Unless you are getting a small screen TV - like 32" - go for 1080p resolution and here’s why. More and more TV channels are becoming available in high-definition, the HD picture quality is vastly superior but you need a 1080p TV to experience the difference.

Jason Bonney adds – “Although I see no reason NOT to get a TV supporting 1080p, it's currently only really needed for Blu-ray. Broadcast HD TV is only 1080i and most video games (XBox 360/PS3) are native 720p being upscaled to 1080. So you can get by with 1080i if need be. I had an HD DLP 1080i for years before upgrading recently, and for HDTV and my 360 games it was still great.”

3D or 2D?

All brands are working hard to sell you 3D-capable TV sets but is 3D worth the extra cost or should you just settle for the good-old 2D? It depends.

We have a joint family and the TV is placed in a common room so we mostly watch it together. In order to enjoy 3D content, one needs to wear 3D glasses. If there are four other people in the room, they also need to wear compatible 3D glasses. The glasses are expensive but cost aside, I highly doubt if folks at home would be willing to wear a pair of glasses for watching a movie or a TV program. Also, there's isn’t enough 3D content available anyway – especially in regional languages - so we decided to go with 2D.

Network Connectivity

The other important feature to consider while deciding a TV is network connectivity. The expensive TV models often have built-in WiFi (or Wireless LAN) while others are WiFi-capable meaning you can attach an extra dongle, always old separately, to connect the TV to the home network or for watching web videos - like YouTube - on your TV wirelessly.

All Internet-ready TVs have an Ethernet port so if you can stretch the LAN cable from the router to the TV, you can go for the WiFi-capable model but without spending on the USB wireless adapter. Also look for DLNA support as it will become easy for you to stream photos, music and videos from your computer and mobile phone to the TV screen.

One more thing. TV vendors like Sony, Panasonic, Samsung and LG bundle various 'apps' to help you watch YouTube videos, Flickr photos and other web content on the HDTV. However, the number of apps offered by these vendors is still small, they have no built-in browsers, no web search and you are thus limited to a very tiny portion of the web.

So what we finally picked is a 50" Panasonic Viera Plasma TV, full HD, lacks 3D, Internet-ready but without built-in Wi-Fi. It is definitely not “razor-thin” but since the unit is mounted on a wall, you rarely notice the thickness. Also, Panasonic offers limited Internet apps but not that we have connected it to Logitech Revue (read review of Google TV), family members can access almost the entire web in the living room.

While everyone has different requirements or “wants” and there’s no such thing as ‘perfect’ when it comes it to buying electronics, the above points may help you make a slightly more informed decision and get more value for your money.

Keep Your Passwords Safe on a Piece of Paper

If you use the same password on multiple websites, your may be in for some trouble.

Say your password for website badwebsite.com is the same as the password for goodwebsite.com. Now if the website badwebsite.com gets compromised (or the owner is malign to start with), they’ll know your password. Chances are that your username is the same (email address) for both websites so the badwebsite.com people can can easily log in to your goodwebsite.com account and impersonate you.

Yeah, there are quite a few reliable Password Managers that serve as a strong room for your complex passwords but that they require you to install specific software on the computer. What do you do when you want to check your web email on a different computer where you do not have your security tools installed and you do not remember your secure, random, email password?

In addition, I doubt you can memorize all your passwords for each and every website, if they are secure from brute-forcing and unique, that is.

Write your passwords down on a paper

What I am trying to solve is to give users a simple way of generating strong passwords unique to every website they visit using just a piece of paper, credit card-sized, that you can carry in your wallet

What you need is just a piece that has a unique (per card) combination of secret letters to help you create a unique password for each website. You may use the RAND() function in an Excel spreadsheet to generate unique password cards.

To create a password, take each letter of the website you want to create a password for and then take the corresponding code from the table. For example, if you want to create a password for www.amazon.com, it would be:

1st letter is a –> a (Column 2, Row 1)
2nd letter is m –> jv (Column 7, Row 2)
3rd letter is a -> AN6
4th letter is z -> xs7
5th letter is o –> enb

So the password for your Amazon website becomes ajvAN6xs7enb.

You can optionally (make sure you do this with all your passwords) intertwine the generated password with a memorized password – it could the city name where you were born, your childhood hero, name of your favorite author or anything memorable.

For instance, if you were born in Philadelphia, the password for Amazon.com would be ajvAN6xs7enb intertwined with Philadelphia: PahjviAN6lxs7aenbdelphia. This would ensure that your identity consists of something you know (Philadelphia) and something you have (the paper password card).

Even if a malicious administrator of website badwebsite.com retrieves your password for that website, they cannot impersonate you on say PayPal or Amazon because you aren’t reusing passwords anymore.

It is a bit cumbersome to use if you had to use it to type in passwords each time, but when used in conjunction with your everyday "remember password" feature found in every browser, you get extra security at the cost of just tiny real state in your wallet.

Security involves trade-offs, in this case is between usability, portability and robustness against collusion or more sophisticated attacks. Arguably though, for a vast majority of people, this is more realistic than carrying an electronic password generator.

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Hide Your Online Status on Facebook Chat from Select Contacts

If you are connected with too many people on Facebook and need to hide your online status on Facebook Chat from certain contacts, here's some help.

Facebook has integrated friends list with Chat and you can also choose which of these list members get to see you online.

So you can stay visible to your family members and close friends while the rest of your Facebook friends won't know if you are logged into Facebook.

Earlier you had to completely turn off Facebook chat in order to hide your online status from other contacts.

The Facebook chat window has easy sliders so you can easily toggle your online status for any friends list in a click.

Use Facebook Chat without opening Facebook.com

Facebook includes an awesome chat feature that lets you instantly start conversations with your Facebook buddies without installing any IM software but the only small issue is that you need to be on the Facebook.com website in order to use Facebook chat.

If you find this a bit inconvenient, here are some good workarounds that will let you chat on Facebook from anywhere without even having to open the Facebook site in your browser.

Facebook Chat Inside the Web Browser

If you have Google Chrome or Prism for Firefox, you can open this address in your browser address bar and then create an application shortcut to Facebook chat on your desktop.

Firefox users may bookmark the above link and set the "Load this bookmark in Sidebar" property to true in order to use Facebook chat from the Firebox sidebar.

Update: Use Skype as Facebook Chat Client

If you an IE user or hate to use Facebook chat from the sidebar, try Geotactic - this is a minimal desktop client for Facebook that looks exactly like the web version of Facebook chat but will also send you notifications of new messages and chat requests from the system tray.

Meebo, the very awesome web based instant messaging service, now supports Facebook chat as well. You can connect your Facebook account with meebo via the Facebook Connect service (so there's no need to share your Facebook credentials with anyone) and instantly chat with your online buddies inside the web browser.

There are two advantages here - you can use Facebook chat even if the main Facebook.com site is blocked in your office and two, you can simultaneously connect with friends on other IM networks from the same website.

Facebook Chat Clients for your Desktop

Chitchat - If Facebook were to develop a standalone messenger on the lines of Yahoo! or Google Talk, it might look something like ChitChat.

ChitChat is a Windows-only desktop client for Facebook that provides a tabbed window to make it easy for you to talk to may friends at once. It will also show notifications in the tray when your friends go online or when they have signed out. The application is in RC stage so expect a few bugs.



Digs by - This is again a very useful all-in-one app that helps you stay up to date with everything happening on your Facebook, Twitter, Gmail, LinkedIn and other online accounts.

If you have multiple accounts on Facebook (like you and your spouse), you can associate all of them with your Disgsby messenger and chat with the combined buddy list simultaneously. Facebook doesn't allow audio or video calls but Digsby indirectly brings that feature to Facebook Chat via tokbox.

Adium - If you are on Mac, Adium is probably the best choice for you to chat with Facebook friends from the desktop.

Like Pidgin and Digsby, Adium too supports multiple IM networks, including Windows Live Messenger, Google Talk, AOL AIM, ICQ, Yahoo! Messenger, Skype, Twitter and Jabber (XMPP). And it uses the same Facebook Chat plugin that is available for Pidgin users on Google Code.

Pidgin - While Facebook Chat is not officially supported in Pidgin, there's a free plug-in that lets you connect to the Facebook chat server from Pidgin. And like Digsby, Pidgin too would let you chat with buddies on multiple Facebook accounts from the same interface.

Pidgin vs Digsby - Pidgin is purely for instant messaging while Digsby will also display notifications like when a friends sends you a message using Facebook email or if he or she writes something on your Facebook wall. Some people in the comments say that even Pidgin displays notifications but at least that doesn't work in Windows 7.

Pidgin will show all your Facebook contacts in one giant list (see update) while Digsby will group contacts under logical "Friends list" just the way you have them on the main facebook.com site. Update: The new version of Facebook Chat plugin for Pidgin displays your online friends under groups just like Pidgin.

Keep your Kids from Seeing Adult Content on the Web

If your tech-savvy kids are spending a fair amount of their computer time surfing the Internet, there’s a chance that they may sometimes accidentally stumble upon adult sites that you would definitely not like them to see. It is nearly impossible for any parent to manually monitor their child’s entire computer session and what you therefore need is a solution that works in the background even while you aren’t around to watch over them.

There are couple of options. For instance, YouTube has a safety mode to block videos that aren’t appropriate for children. Then you have OpenDNS that you can configure with your router or computer to block an entire category of websites that contain violent or adult content.

There are some site blocking programs (NetNanny for example) that monitor your kid’s activity on the computer and will automatically restrict them from visiting sites that aren’t meant for them. Then you have the slightly-geeky 127.0.0.1 trick to that helps you block any of the known websites on your computer.

A More Straightforward Solution to Block Sites

If you are looking for a more simple solution to keep all adult sites off your computers, switch to Family Shield as described in the following video:

FamilyShield is part of the previously described OpenDNS service but the advantage here is that you don’t have to do any tweaking to block adult content – just change your DNS server entries (these are different from the original OpenDNS values) and the web filters are immediately activated.

If you chose to setup FamilyShield on your router, sites that contain adult content will automatically get blocked on all your computers, gaming consoles and even mobile phones that are part of your home network. It even blocks proxy sites that are commonly used bypass the web filters.

It can’t get easier than this and there’s no software to install though your kids are likely to encounter ads when a site they’re trying to visit gets blocked – that’s the business model of OpenDNS.

Give your Eyes a Break with the 20-20-20 Rule

If you spend a good part of your day using the computer, the 20-20-20 rule, that I recently learned recently from my doctor, might also help you relax your tired eyes

The rule goes something like this.
The screen is bright and therefore, if you don’t blink your eyes as often as you should while working at the computer for long hours, you can have dry eyes sometimes even followed by redness.
To help you deal with this problem, the 20-20-20 rule suggest that after every 20 minutes, you (the computer user) should take a break for at least 20 seconds and look at objects that are 20 feet away from you.
Since it is nearly impossible for any computer users to remember that they have to take a break every 20 minutes, there are free software programs that can help you in your mission.
For instance, there’s a Windows utility called Eye Defender that sits in the system tray and, after a fixed interval, it will auto-run a visual training (see video below in full screen) for the eyes on your screen.
You are supposed to follow the pointer on the screen and this in turn should help relax your eyes.
Work Rave is another handy app that reminds you to take breaks at regular intervals to prevent computer related stress (including eyestrain).
It offers two kinds of breaks – micro-breaks, these are short and are mean to relax your eyes, and then there are rest-breaks where you are supposed to walk or stretch a little. Workrave also has a built-in wizard that demonstrates the various types of stretching exercises that you can do during these breaks.

Test your Eyes Online

They say that you should get your eyes checked every two years but if haven’t had the chance to see a doctor all this time, you can test your vision on your computer as well.

Of course these self eye tests are no substitute for visiting your doctor but if you follow the steps well, you may get some idea about how good (or bad) your vision is.

The Snellen Eye Chart

Most of us are familiar with the Snellen Chart that is made of rows of alphabets of different sizes – you read these letters from a distance, usually twenty feet, and the smallest row that you can recognize accurately indicates whether you have normal vision or not.

The various eye testing tools that are available online make use of the same Snellen chart.

Test your Eyesight Online

You should start with University at Buffalo's IVAC tool. Use a physical ruler to measure the length of the line on the screen (the length will vary depending on your screen resolution). Also measure the distance of your eyes from the computer screen. Now read the row of letters on the screen and press ‘smaller’ to display more rows in decreasing sizes.

While performing the test, you need to cover one eye and when you have read all the characters from top-to-bottom, read them again but cover the other eye this time. When you can no longer read the letters, stop!

Another Flash based eye testing tool is hosted on thinkquest.org – this can work accurately only with computer monitors that are either 15”, 17” or 19” in size. Stand four feet from the screen and then follow the on-screen instructions. When the characters are no longer readable, hit the stop button and it will display your visual acuity.

Finally, if you are looking for more DIY solution, try this. Open the Snellen Chart image on your computer screen and measure the size of the big letter E using a ruler. Multiply that number by 2.838 and stand that far from the screen while taking the test. Now try reading the different letters, top to bottom, to check your vision.