Computer Security

If you have no computer security, people can find out everything you have done on that computer. If you ordered something online then they could find your credit card number. They could get all of your passwords and email accounts. Basically your computer is at the mercy of the outside world.

Two reasons, one, you don't want to track dirt and debris in. Two, helps eliminate ESD, static.

It is because if you have a key hole people can find the right shaped key and use it to open the door whereas if there is a password only you would know how to open the door

Yes php 4.4.7 server support php 5 files. But most of the php 5 features are not supported by php 4.4.7 version

First, Download Bitlocker.

You can download it on the Softpedia Website.

After downloading, you can now double click the newly downloaded File and start the installation. Follow the steps. If you are propted with EULA (End-User License Agreement), select I agree..

After installing, insert the pendrive and right click it's icon, click the "Bit Locker" encryption icon.

Under least privilege principles, a users should be granted full rights to their own files, e.g. create, read, write, modify, delete, execute, etc. The exact rights will depend some on what the underlying OS is. Beyond that, users may also be granted limited privileges to other files to enable them to perform their responsibilities. If they are a member of another group, they may be granted read, write, or execute privileges for "group" files. The way the privileges are assigned will depend on the access control model being used. Will it be Mandatory Access Control, Discretionary Access Control, Role Based Access Control, or some other model? Depending on the model, You may have to define other privileges like "take ownership", "give ownership", or "assign classification". You usually would only want to allow a user to have the "give ownership" rights for their own files, but have a higher arbiter having the "assign classification" rights.

The ACL (Access Control list) has the individual ACE entries.

Microsoft Windows

the passive entity that is the target of an access request.

the active entity that initiates an access request.

No. There are many way of breaking into a system without using JavaScript.

You can't decrypt them, that's why it's called one-way. The only way to get the password is to encrypt guess words with the same algorithm and checking if the result matches the encrypted password. So if your encrypted password is a9d82da, guess what it might be - maybe "frank"? - and encrypt that word, and if you get 29d8afd, you know the password is not "frank", so try another word. If one of them encrypts into a9d82da, then you know that's the password.
Passwords are often guessed this way by using a dictionary - a simple list of words - and automatically encrypting them one by one and comparing the result with the encrypted password. Another approach that takes much longer is to try every possible combination of characters, such as aa, ab, ac, aaa, aab, aac, aba, abb, abc, etc. This can take weeks, months, even years, depending on the algorithm used and the speed of your computer.

NAND gates are universal gates and can be used to construct any of the logic gates (AND, OR, NOT, NOR, XOR, XNOR). The easiest way to figure this out is to use basic Boolean Laws. For instance, to create a NOT gate (A'), tie one of the NAND gate's input to logic high: (A+1)' = A'. To create an AND gate (AxB), use two NANDs in series, with the second one configured as an inverter: (AxB) = ((AxB)')'

all macs have the same level of security

but to be extra sequre and encrypt your local hard drive go to system_prefererences>security_and_privacy then turn on filevault

also to be extra secure restart your computer while holding down alt/option then selct recovery wait for it to start up and then select utilities and then firmware password. also encrypt usb sticks by right clicking on the drive and then select encrypt

It is a piece of Apple Software which is installed silently when you install sofware like iTunes, Safari, Quicktime 7.

Not without knowing your secret keyword to decrypt them.

fot the past 25 years single des algorithm was used. But now triple des is used in atm cards for the encryption and decryption.

Security is a difficult and sometimes controversial thing to analyze. The only truly "secure" operating systems are those that have no contact with the outside world. The firmware in your DVD player is a good example.

Among all modern general purpose operating systems (Windows, Mac OS X, Linux, Solaris, FreeBSD, NetBSD, OpenBSD) the most secure by defualt is by far OpenBSD. OpenBSD has an extremely stringent security auditing policy; only two remote attack vulnerabilities have been found in the last ten years. This is because OpenBSD doesn't create a large attack surface by running a large number of networked apps.

Of course, the sad fact is that any networked operating system can be made insecure through careful misconfiguration. Window's problems with security stem mainly from the fact that it runs with a large number of network services on by default, and that it (XP and prior) let the user run with full privileges by default. Windows Vista attempted to fix this issue, but people rejected it as "too confusing" and complained that their old apps did not work correctly under limited accounts.

Mac OS X is better about user permissions, but still has had a (in)decent number of remote exploits. Apple's slow response to patch many of these issues will be even more worrying if it gains significant market share.

Most Linux distributions have an excellent policy of quickly patching known security vulnerabilities. Unfortunately, two of the top ten distros deliberately use outdated code (Damn Small Linux) or make it too easy to run as a privileged user by mistake (Damn Small Linux, Puppy Linux). Were these distros to gain significant popularity, their users would be exposed to a larger number of vulnerabilites than if they encouraged proper security policies.

I am assuming you are referring to a wireless access point (WAP), if this is wrong, please restate your question with more clarification.

A wireless access point usually connects a wireless device to a wired network. In some instances it establishes connections between two wireless devices, but this is a much less common way to use an access point. Either way, it is usually in the form of a WiFi (802.11 protocol) router or bridge or Bluetooth device. While few Bluetooth devices has any kind of security key, most wireless routers can be configured to require a password or passphrase to connect to it. The router may ship with a default password, but the person setting it up can log onto it and set a new password. Some wireless routers also connect to an authentication server which provides additional authentication, a user can connect to the access point, but until they have authenticated via the connected authentication server, they cannot access the network the wireless router is connected to.

1940s to 1958: vacuum tube computers, primary I/O magnetic tape or punched cards.

If you're talking about symmetric key encryption (the kind where you just use one key for encryption and decryption), then arguably, the best encryption algorithm you can use is the Rijndael algorithm, better known now as AES (advanced encryption standard). It is the encryption standard used by the U.S. government for classified information. It is fast, requires little memory, and the only potential attacks against it are highly theoretical.

Rijndael beat out Twofish and Serpent in the AES standard contest, but those other two algorithms will provide more than enough security as well. In the end, it doesn't really matter, since most successful attacks are made simply by finding out your key through brute force, espionage or extortion, rather than pure data analysis.

Humans are almost always the weakest point when it comes to security, and it doesn't matter what algorithm you use if someone can guess your password.

because it is more secure than any other algorithm.