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Computer Security
Computer security is the prevention/detection of, and response to, any unauthorized actions by users of a computer system. Questions about security practices and principles belong here.
1,022 Questions
What is the characteristic of Imposter in operating system?
The most common symptom is noticing new programs that you did not install yourself. There are other signs as well such as having your default homepage on your browser changed, pop up ads without having a browser open, programs letting you know there are viruses on your computer but require you to purchase the program in order to remove them, and an abundance of processes running in the task manager.
Which is better encryption algorithm among DES Blowfish and MD5?
MD5 isn't a encryption algorithm, it's a hashing algorithm.
Encryption will 'hide' the meaning of the encrypted text, while MD5 will 'add up' all the text to come up with a number. This number can be compared to another time this file was 'added up', to provide a simple kind of check to see if the text has been changed or if it is the same.
What is the product key for gmail password hacker v2.8.9?
There is no product key for GM Password Hacker V2.8.9. This is because you need to purchase your own copy of the program in order to get the product key. Copying passwords without purchasing them is illegal.
Why all computer users should be concerned about 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.
How the OS communicate with CPU?
The OS communicates with the CPU via the "kernel" - which is actually a core part of the OS.
When an operating system is loaded into memory, the kernel loads first and remains in memory until the operating system is shut down again. It should load into a protected portion of memory that cannot be written to by any other process. A computer kernel interfaces between the three major computer hardware components, providing services between:
- the application/user interface
- the CPU, memory
- other hardware I/O devices
What does a file shredder actually do?
A file shredder, is a program to completely remove a filefrom a hard drive or any Magnetic and Solid-State Memory device.
But what does actually do?
It overwrites the portion on the hard drive that was previously allocated to the designated file with carefully selected patterns or junk data of different lengths, (depending on the sofware you are using), it changes the file's attributes, such as the file's name, its date stamp and its modification time several times.
For windows file shredders, after this process has been made several times, the file is deleted the way Windows understands it, i.e. the listing of that file is removed from the Windows registry and the first character in the file allocation (FAT) table is overwritten to signal other applications that the disk space is now available for further use.
Why should remove shoes before enter the computer lab?
Two reasons, one, you don't want to track dirt and debris in. Two, helps eliminate ESD, static.
What is the aim of password based door locking?
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
Will php 4.4.7 server support php 5 files?
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
How do you install bit locker encription?
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.
What is a collection of individual permissions in the form of access control entries?
The ACL (Access Control list) has the individual ACE entries.
the passive entity that is the target of an access request.
the active entity that initiates an access request.
Is java script necessary for hacking?
No. There are many way of breaking into a system without using JavaScript.
How do you do th decryption of passwords encrypted by one way hashing algorithm?
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.
How do you construct other logic gates from nand gate?
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)')'
Encryption algorithms AES is FIPS 140-2 compliant?
Properly implemented, AES is FIPS 140-2 compliant.
A module implementing AES must undergo evaluation via the Cryptographic Module Validation Program (CMVP) to be certified as FIPS 140-2 compliant. Federal agencies and departments can validate that the module in use is covered by an existing FIPS 140-1 or FIPS 140-2 certificate that specifies the exact module name, hardware, software, firmware, and/or applet version numbers.
Which mac level has the highest level of security?
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
What does the program Bonjour do in Windows Vista?
It is a piece of Apple Software which is installed silently when you install sofware like iTunes, Safari, Quicktime 7.
What are some consequences of hacking?
being jailed
need to pay a fine
lose you're rights to use a computer
Answer
In my opinion hacking is gaining access to a system and its servers or banks of information. There are are two types of hacking illegal and legal. Illegal is when you hack without a person's permission. Legal hacking is obtaining a person systems legally. The consequences of illegal hacking are thousands of dollars in fines, imprisonment, and the seizure of your computer.
Answer
Hacking is to know and understand how systems work. Cracking is doing harm with theses skills.
If searching for consequences of cracking then: Well, when detected... : probably, the crackers IP-adress is going to be traced and disabled acces to internet for a while. Than, when the cracking was real seriously, (like cracking government systems and such) the crackers PC, and thus the crackers location is located, and the cracker gets caught.
Answer
In Pennsylvania hacking is illegal. Hacking is known as "unlawful use of computer and other computer crimes - 18 Pa. Cons. Stat. § 7611" which is a third degree felony. Use of force for the protection of property - 18 Pa. Cons. Stat. § 507(c)Limitations on justifiable use of force (4)(ii)(B) such force is necessary to prevent the commission of a felony in the dwelling. What do you think the consequence of hacking illegally into my computer is, let's hope it is an arrest.
game being frozen i guess
What are the encryption algorithms used in ATM?
fot the past 25 years single des algorithm was used. But now triple des is used in atm cards for the encryption and decryption.
What is the most secure operating system?
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.
