Saturday, February 21, 2009
HACK PASSWORD FROM FIREFOX 3.0
Whenever you log in to a website using your username and password, you'll be prompted by Firefox 3.0 whether you'd like Firefox to remember this password.If you click on Remember, the next time you visit the website, it'll automatically enter the username and password for your convenience.Now, back to the topic. Let's say you saved your G Mail password in Firefox. After months or years gone by and you don't remember the password you set for my G Mail. You started to panic and desperately need to get back your G Mail password.Don't worry, here's how you can find the hidden GMail password in Firefox.Firefox 3.0 is much better than Internet Explorer in terms of managing "remembered" logins. In Internet Explorer, there is no built-in feature where you can manage or view your saved login information. That's why you need third party tools to reveal the passwords hidden under asterisks. As for Firefox 3.0, you can access remembered passwords with a few clicks.To view your remembered passwords in Firefox browser, go to Tools, and click on Options. Go to Security tab and click on the Show Passwords button. A remember password dialog box will appear. Click on the Show Passwords button again and a new column with password will appear
Friday, February 20, 2009
ALL ABOUT TROJAN,VIRUS,WORM,SPYWARE,LOGIC BOMB
Trojan :
A Trojan is not a computer virus in the sense that it doesn't get into
your system and self-replicate. The Trojan derives its name from
the ancient Greek story of the Trojan Horse, where a group of
warriors invades a city by hiding within a giant wooden horse. The
residents of the city thought the horse to be a gift, never knowing
what was hidden inside, so they rolled the horse in bringing their
enemy within the city walls with it. The Greek Trojan horse
appeared to be something that it was not, just as the computer
Trojan is. A computer Trojan is software that appears to function in
a certain way, when in reality it performs another action. A Trojan is
not always harmful and damaging to your system, but it can open a
back door for hackers to get into your computer and cause damage
or retrieve information.It is a program which does an unauthorized
function, hidden inside an authorized program. It does something other
than what it claims to do, usually something malicious
and it is intended by the author to do whatever it does. If it's not
intentional, its called a 'bug' or, in some cases, a feature :) Some
virus scanning programs detect some trojans. Some virus scanning
programs don't detect any trojans. No virus scanners detect all
Trojans.
Virus:
Computer Viruses have been around since the early 1980's.
A virus is an independent program which reproduces itself. It may
attach to other programs, it may create copies of itself (as in
companion viruses). It may damage or corrupt data, change data, or
degrade the performance of your system by utilizing resources such as
memory or disk space. Some virus scanners detect some viruses. No
virus scanners detect all viruses. No virus scanner can protect
against "any and all viruses, known and unknown, now and forevermore".
Because every anti virus updates their database after the virus come to
existence.
Worm:
Made famous by Robert Morris, Jr. , worms are programs which reproduce
by copying themselves over and over, system to system, using up
resources and sometimes slowing down the systems.
Computer Worms are like a virus in the fact that they do self-replicate
themselves within your computer system. However, a computer worm
does not have to attach itself to a program in your system like a computer
virus does in order to function. Also, unlike a computer virus that generally corrupts
and modifies files on your computer to cause damage, a computer worm
generally localizes its damage to the computer network. Computer worms
can often spread via email such as the SoBig and MyDoom worms did
(from 2003 and 2004 respectively).They are self contained and use the networks
to spread, in much the same way viruses use files to spread.
Spyware:
software that covertly gathers user information through the user's Internet
connection without his or her knowledge, usually for advertising purposes.
Spyware applications are typically bundled as a hidden component of freeware
or shareware programs that can be downloaded from the Internet; however, it should
be noted that the majority of shareware and freeware applications do not come with
spyware. Once installed, the spyware monitors user activity on the Internet and
transmits that information in the background to someone else. Spyware can also
gather information about e-mail addresses and even passwords and credit card numbers.
Aside from the questions of ethics and privacy, spyware steals from the user by using
the computer's memory resources and also by eating bandwidth as it sends information
back to the spyware's home base via the user's Internet connection. Because spyware
is using memory and system resources, the applications running in the background can
lead to system crashes or general system instability.Because spyware exists as
independent executable programs, they have the ability to monitor keystrokes, scan
files on the hard drive, snoop other applications, such as chat programs or word
processors, install other spyware programs, read cookies, change the default home
page on the Web browser, consistently relaying this information back to the spyware
author who will either use it for advertising/marketing purposes or sell the information
to another party.
Logic Bomb:
Code which will trigger a particular form of 'attack' when a
designated condition is met. For instance, a logic bomb could delete
all files on Dec. 5th. Unlike a virus, a logic bomb does not make
copies of itself.
While different in the functions they perform, Viruses, Trojans, Worms and
Spyware are all damaging to your computer. It is most important
you have proper computer protection software in place
that will protect you from these things so they cannot get into your computer
and cause damage.
A Trojan is not a computer virus in the sense that it doesn't get into
your system and self-replicate. The Trojan derives its name from
the ancient Greek story of the Trojan Horse, where a group of
warriors invades a city by hiding within a giant wooden horse. The
residents of the city thought the horse to be a gift, never knowing
what was hidden inside, so they rolled the horse in bringing their
enemy within the city walls with it. The Greek Trojan horse
appeared to be something that it was not, just as the computer
Trojan is. A computer Trojan is software that appears to function in
a certain way, when in reality it performs another action. A Trojan is
not always harmful and damaging to your system, but it can open a
back door for hackers to get into your computer and cause damage
or retrieve information.It is a program which does an unauthorized
function, hidden inside an authorized program. It does something other
than what it claims to do, usually something malicious
and it is intended by the author to do whatever it does. If it's not
intentional, its called a 'bug' or, in some cases, a feature :) Some
virus scanning programs detect some trojans. Some virus scanning
programs don't detect any trojans. No virus scanners detect all
Trojans.
Virus:
Computer Viruses have been around since the early 1980's.
A virus is an independent program which reproduces itself. It may
attach to other programs, it may create copies of itself (as in
companion viruses). It may damage or corrupt data, change data, or
degrade the performance of your system by utilizing resources such as
memory or disk space. Some virus scanners detect some viruses. No
virus scanners detect all viruses. No virus scanner can protect
against "any and all viruses, known and unknown, now and forevermore".
Because every anti virus updates their database after the virus come to
existence.
Worm:
Made famous by Robert Morris, Jr. , worms are programs which reproduce
by copying themselves over and over, system to system, using up
resources and sometimes slowing down the systems.
Computer Worms are like a virus in the fact that they do self-replicate
themselves within your computer system. However, a computer worm
does not have to attach itself to a program in your system like a computer
virus does in order to function. Also, unlike a computer virus that generally corrupts
and modifies files on your computer to cause damage, a computer worm
generally localizes its damage to the computer network. Computer worms
can often spread via email such as the SoBig and MyDoom worms did
(from 2003 and 2004 respectively).They are self contained and use the networks
to spread, in much the same way viruses use files to spread.
Spyware:
software that covertly gathers user information through the user's Internet
connection without his or her knowledge, usually for advertising purposes.
Spyware applications are typically bundled as a hidden component of freeware
or shareware programs that can be downloaded from the Internet; however, it should
be noted that the majority of shareware and freeware applications do not come with
spyware. Once installed, the spyware monitors user activity on the Internet and
transmits that information in the background to someone else. Spyware can also
gather information about e-mail addresses and even passwords and credit card numbers.
Aside from the questions of ethics and privacy, spyware steals from the user by using
the computer's memory resources and also by eating bandwidth as it sends information
back to the spyware's home base via the user's Internet connection. Because spyware
is using memory and system resources, the applications running in the background can
lead to system crashes or general system instability.Because spyware exists as
independent executable programs, they have the ability to monitor keystrokes, scan
files on the hard drive, snoop other applications, such as chat programs or word
processors, install other spyware programs, read cookies, change the default home
page on the Web browser, consistently relaying this information back to the spyware
author who will either use it for advertising/marketing purposes or sell the information
to another party.
Logic Bomb:
Code which will trigger a particular form of 'attack' when a
designated condition is met. For instance, a logic bomb could delete
all files on Dec. 5th. Unlike a virus, a logic bomb does not make
copies of itself.
While different in the functions they perform, Viruses, Trojans, Worms and
Spyware are all damaging to your computer. It is most important
you have proper computer protection software in place
that will protect you from these things so they cannot get into your computer
and cause damage.
VIRTUAL MEMORY
VIRTUAL MEMORY AND HOW MUCH VIRTUAL MEMORY YOU NEED FOR YOUR SYSTEM.
Today application is getting bigger and bigger. Therefore, it requires a bigger system memory in order for the system to hold the application data, instruction, and thread and to load it. The system needs to copy the application data from the HDD into the system memory in order for it to process and execute the data. Once the memory gets filled up with data, the system will stop loading the program. In this case, users need to add more memory onto their system to support that intense application. However, adding more system memory costs the money and the normal user only needs to run the the intense application that requires the memory only for one or two days. Therefore, virtual memory is introduced to solve that type of problem.
There are two types of memory, which are as follows:
System Memory :- System memory is a memory that is used to store the application data and instruction in order for the system to process and execute that application data and instruction. When you install the memory sticks to increase the system RAM, you are adding more system memory. System Memory can be known as either the physical memory or the main memory.
Virtual Memory :- Virtual Memory is a memory that uses a portion of HDD space as the memory to store the application data and instruction that the system deemed it doesn't need to process for now. Virtual Memory can be known as the logical memory, and it controls by the Operating System, which is Microsoft Windows. Adding the Virtual Memory can be done in system configuration.
Virtual Memory is a HDD space that uses some portion of it as the memory. It is used to store application data and instruction that is currently not needed to be process by the system.
During the program loading process, the system will copy the application data and its instruction from the HDD into the main memory (system memory). Therefore the system can use its resources such as CPU to process and execute it. Once the system memory gets filled up, the system will start moving some of the data and instruction that don't need to process anymore into the Virtual Memory until those data and instruction need to process again. So the system can call the next application data and instruction and copy it into the main memory in order for the system to process the rest and load the program. When the data and instruction that is in the Virtual Memory needs to process again, the system will first check the main memory for its space. If there is space, it will simply swap those into the main memory. If there are not any space left for the main memory, the system will first check the main memory and move any data and instructions that doesn't need to be process into the Virtual Memory. And then swap the data and instruction that need to be process by the system from the Virtual Memory into the main memory.
Having too low of Virtual Memory size or large Virtual Memory size (meaning the size that is above double of the system memory) is not a good idea. If you set the Virtual Memory too low, then the OS will keep issuing an error message that states either Not enough memory or Virtual too low. This is because some portion of the system memory are used to store the OS Kernel, and it requires to be remain in the main memory all the time. Therefore the system needs to have a space to store the not currently needed process data and instruction when the main memory get filled up. If you set the Virtual Memory size too large to support the intensive application, it is also not a good idea. Because it will create the performance lagging, and even it will take the HDD free space. The system needs to transfer the application data and instruction back from the Virtual Memory to the System Memory. Therefore, that is not a good idea. The ideal size for the Virtual Memory is the default size of Virtual Memory, and it should not be exceed the value of the triple size of system memory.
To determine how much virtual memory you need, since the user's system contains the different amount of RAM, it is based on the system. By default, the OS will set the appropriate size for Virtual Memory. The default and appropriate size of Virtual Memory is:
CODE
* 1.5 =
.
For example, if your system contains 256 MB of RAM, you should set 384 MB for Virtual Memory.
CODE
256 MB of RAM (Main Memory) * 1.5 = 384 MB for Virtual Memory
If you would like to determine how much the Virtual Memory is for your system and/or would like to configure and add more virtual memory, follow the procedure that is shown below. The following procedure is based on windows XP Professional.
1-1) Go to right-click My Computer and choose Properties
1-2) In the System Properties dialog box, go to Advanced tab
1-3) Click Settings button that is from the Performance frame
1-4) Once the Performance Options shows up on the screen, go to Advanced tab
1-5) Under the Advanced tab, click the Change button from the Virtual Memory frame to access to the Virtual Memory setting
Then the Virtual Memory dialog box appears on the screen. In there, you are able to check how much the Virtual Memory you set. If you would like to modify the size of Virtual Memory, follow the procedure that is shown below.
2-1) In there, select the drive letter that is used to install the Operating System
2-2) Choose the option that says, "Custom Size:"
Once you choose that option, the setting for Initial Size and Maximum Size become available for you to set. Initial Size (MB) means the actual size of Virtual Memory, and Maximum Size (MB) means the maximum size of Virtual Memory that is allowed to use.
Let's say if your system contains 512 MB of RAM, then the ideal setting for the Virtual Memory is as follows:
CODE
Initial Size (MB): 768
Maximum Size (MB): 1500
Once you are happy with that Virtual Memory size, click the Set button from Paging file size for selected drive to apply the setting for the Virtual Memory size. Then click the OK button to apply the setting.
That's where you can manage and configure for the size of Virtual Memory.
To maintain the good overall system performance, you should be using the default size of actual size for Virtual Memory and the triple the value of the size of the main memory for the maximum size of Virtual Memory. If you find that main memory plus virtual memory is not big enough to load the intensive application, then you will need to add more main memory onto your system.
Today application is getting bigger and bigger. Therefore, it requires a bigger system memory in order for the system to hold the application data, instruction, and thread and to load it. The system needs to copy the application data from the HDD into the system memory in order for it to process and execute the data. Once the memory gets filled up with data, the system will stop loading the program. In this case, users need to add more memory onto their system to support that intense application. However, adding more system memory costs the money and the normal user only needs to run the the intense application that requires the memory only for one or two days. Therefore, virtual memory is introduced to solve that type of problem.
There are two types of memory, which are as follows:
System Memory :- System memory is a memory that is used to store the application data and instruction in order for the system to process and execute that application data and instruction. When you install the memory sticks to increase the system RAM, you are adding more system memory. System Memory can be known as either the physical memory or the main memory.
Virtual Memory :- Virtual Memory is a memory that uses a portion of HDD space as the memory to store the application data and instruction that the system deemed it doesn't need to process for now. Virtual Memory can be known as the logical memory, and it controls by the Operating System, which is Microsoft Windows. Adding the Virtual Memory can be done in system configuration.
Virtual Memory is a HDD space that uses some portion of it as the memory. It is used to store application data and instruction that is currently not needed to be process by the system.
During the program loading process, the system will copy the application data and its instruction from the HDD into the main memory (system memory). Therefore the system can use its resources such as CPU to process and execute it. Once the system memory gets filled up, the system will start moving some of the data and instruction that don't need to process anymore into the Virtual Memory until those data and instruction need to process again. So the system can call the next application data and instruction and copy it into the main memory in order for the system to process the rest and load the program. When the data and instruction that is in the Virtual Memory needs to process again, the system will first check the main memory for its space. If there is space, it will simply swap those into the main memory. If there are not any space left for the main memory, the system will first check the main memory and move any data and instructions that doesn't need to be process into the Virtual Memory. And then swap the data and instruction that need to be process by the system from the Virtual Memory into the main memory.
Having too low of Virtual Memory size or large Virtual Memory size (meaning the size that is above double of the system memory) is not a good idea. If you set the Virtual Memory too low, then the OS will keep issuing an error message that states either Not enough memory or Virtual too low. This is because some portion of the system memory are used to store the OS Kernel, and it requires to be remain in the main memory all the time. Therefore the system needs to have a space to store the not currently needed process data and instruction when the main memory get filled up. If you set the Virtual Memory size too large to support the intensive application, it is also not a good idea. Because it will create the performance lagging, and even it will take the HDD free space. The system needs to transfer the application data and instruction back from the Virtual Memory to the System Memory. Therefore, that is not a good idea. The ideal size for the Virtual Memory is the default size of Virtual Memory, and it should not be exceed the value of the triple size of system memory.
To determine how much virtual memory you need, since the user's system contains the different amount of RAM, it is based on the system. By default, the OS will set the appropriate size for Virtual Memory. The default and appropriate size of Virtual Memory is:
CODE
.
For example, if your system contains 256 MB of RAM, you should set 384 MB for Virtual Memory.
CODE
256 MB of RAM (Main Memory) * 1.5 = 384 MB for Virtual Memory
If you would like to determine how much the Virtual Memory is for your system and/or would like to configure and add more virtual memory, follow the procedure that is shown below. The following procedure is based on windows XP Professional.
1-1) Go to right-click My Computer and choose Properties
1-2) In the System Properties dialog box, go to Advanced tab
1-3) Click Settings button that is from the Performance frame
1-4) Once the Performance Options shows up on the screen, go to Advanced tab
1-5) Under the Advanced tab, click the Change button from the Virtual Memory frame to access to the Virtual Memory setting
Then the Virtual Memory dialog box appears on the screen. In there, you are able to check how much the Virtual Memory you set. If you would like to modify the size of Virtual Memory, follow the procedure that is shown below.
2-1) In there, select the drive letter that is used to install the Operating System
2-2) Choose the option that says, "Custom Size:"
Once you choose that option, the setting for Initial Size and Maximum Size become available for you to set. Initial Size (MB) means the actual size of Virtual Memory, and Maximum Size (MB) means the maximum size of Virtual Memory that is allowed to use.
Let's say if your system contains 512 MB of RAM, then the ideal setting for the Virtual Memory is as follows:
CODE
Initial Size (MB): 768
Maximum Size (MB): 1500
Once you are happy with that Virtual Memory size, click the Set button from Paging file size for selected drive to apply the setting for the Virtual Memory size. Then click the OK button to apply the setting.
That's where you can manage and configure for the size of Virtual Memory.
To maintain the good overall system performance, you should be using the default size of actual size for Virtual Memory and the triple the value of the size of the main memory for the maximum size of Virtual Memory. If you find that main memory plus virtual memory is not big enough to load the intensive application, then you will need to add more main memory onto your system.
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