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Building Secure Software (tutorial) Virtual memory. Virtual memory combines active RAM and inactive memory on DASD[NB 1] to form a large range of contiguous addresses. In computing, virtual memory is a memory management technique that is implemented using both hardware and software. It maps memory addresses used by a program, called virtual addresses, into physical addresses in computer memory. Main storage as seen by a process or task appears as a contiguous address space or collection of contiguous segments. The operating system manages virtual address spaces and the assignment of real memory to virtual memory. The primary benefits of virtual memory include freeing applications from having to manage a shared memory space, increased security due to memory isolation, and being able to conceptually use more memory than might be physically available, using the technique of paging.

Properties[edit] Memory virtualization can be considered a generalization of the concept of virtual memory. Usage[edit] History[edit] Paged virtual memory[edit] Linearizability. Primitive atomic instructions[edit] Most processors include store operations that are not atomic with respect to memory. These include multiple words stores and string operations. Should a high priority interrupt occur when a portion of the store is complete, the operation must be completed when the interrupt level is returned. The routine that processes the interrupt must not access the memory being changed. When there are multiple instructions which must be completed without interruption, a CPU instruction which temporarily disables interrupts is used.

High-level atomic operations[edit] Another approach, favoured by researchers (but not yet widely used in the software industry), is to design a linearizable object using the native atomic primitives provided by the hardware. A promising hybrid of these two is to provide a transactional memory abstraction. Compare-and-swap writes a new value into a location only if the latter's contents matches a supplied old value.

Non-atomic[edit] 2010 Video Game Industry Predictions. Video gaming to be twice as big as music by 2011. Gaming sometimes seems like a "niche," and the mainstream media certainly treats it that way. However, a comparison of the gaming market with that of movies and music shows that gaming is much larger than many people think. Hence our ears perked up when Ubisoft CEO Yves Guillemot said last week that the video game market was poised for massive growth—a 50 percent increase over the next four years. Assuming that Guillemot isn't simply blowing fumée about his industry's growth potential (always a possibility at these kind of events), video games will soon run eclipse both box office revenues and recorded music revenues.

That a lot of copies of Halo to move; is gaming really ready to get this big? The US market We'll start with the US market, then take a look at the worldwide picture. Gaming had some major growth, but much of it was in the past, when the industry surged from $2.6 billion in sales to $7 billion between 1996 and 2000.

Data sources: RIAA, MPAA, The NPD Group Around the world. The Future of Gaming: 5 Social Predictions. Earlier today, video gaming giant Electronic Arts (EA) announced its blockbuster acquisition of the Facebook/social gaming company Playfish for between $300-400 million. It's a major move by EA into the social gaming space and one that places a smart team and a set of top-rated social networking games (e.g. Pet Society) into its control. While it's too early to understand the ramifications and implications of the Playfish acquisition, we do firmly believe that the potential impact of the EA/Playfish combo are enormous.

This is the first time the social and video gaming realms have truly merged. In fact, it could prove to be a watershed moment for not only the social gaming industry, but for video games in general. After thinking about the current state of gaming and how social gaming could affect, we've come up with a set of six predictions surrounding how social gaming could affect not only Electronic Arts, but the entire video gaming industry. 1. 2. 3. 4. 5. GameON Finance 2.0: Key Gaming Industry Trends And Market Overview. Online Games & the Law - Security/App-security - DarkReading. US law struggles to keep up with new capabilities in collaborative computing environments I suppose any article on the law should include a disclaimer at the top. I am not a lawyer, nor do I play one on the Internet. Take everything you read here with a largish block of salt.

Computer security has always had a law enforcement aspect, but the law consistently lags behind the technical cutting edge. Recent advancements in software design and the advent of geographically distributed applications puts the law even further behind than usual. The time has come to rethink computer security law in light of advances in software architecture. A Brief History of U.S. Another law introduced in 1986, the Electronic Communications Privacy Act (ECPA), criminalized unauthorized network sniffing and other interception of data. As computer crime evolved to include malicious exploits such as viruses and worms, early statutes began to show their age. In late 1998, the U.S.

Exploiting Online Games Is Legal? Exploiting Online Games: Virtual World Security-Greg Hoglund. Exploiting Online Games: Cheating Massively Distributed Systems (9780132271912): Greg Hoglund, Gary McGraw. Online game exploits threaten IT security. Bill Brenner, Senior News Writer Published: 14 Mar 2007 SearchSecurity.com members gain immediate and unlimited access to breaking industry news, virus alerts, new hacker threats, highly focused security newsletters, and more -- all at no cost. Join me on SearchSecurity.com today! Your upcoming book "Exploiting Online Games" is about games like World of Warcraft and Everquest. How did you pick online games as a subject? The book is really about massive multiplayer online role-playing games.

You can think of these as Dungeons and Dragons over the Internet. The games today are demonstrating what the software security problems of tomorrow will look like. Cheating in online games. Cheating in online games is defined as the action of pretending to comply with the rules of the game, while secretly subverting them to gain an unfair advantage over an opponent.[1] Depending on the game, different activities constitute cheating and it is either a matter of game policy or consensus opinion as to whether a particular activity is considered to be cheating.

Cheating reportedly exists in most multiplayer online games, but it is difficult to measure.[2] The Internet and darknets can provide players with the methodology necessary to cheat in online games, sometimes in return for a price. Bots and software assistance[edit] Aimbots and triggerbots[edit] An aimbot (sometimes called "auto-aim") is a type of computer game bot used in multiplayer first-person shooter games to provide varying levels of automated target acquisition to the player. Some servers allow inactive players to spectate, watching the game from the viewpoints of the active players. Look-ahead[edit] ESP[edit] SC2011 - OpenConf Conference Management System. QuickTime 'evil pink box' flaw hits Second Life - News - Builder AU. Security Forums :: View topic - A virus within a JPEG. Well, that really depends on the format in question (jpeg in the example) and, most of all, it's implementation in the target program.

While the definition of a standard (like JPEG) may be globally common, the way in which each program implements the reading of a jpeg file can vary - some may check everything to see that it's valid, some may skip a few checks for speed or simplicity, some may be more efficiently coded, some may be less efficiently coded, etc. This is only to say that even though two programs open the same type of file, they may work differently under the hood.

It's those differences that make up the possibility that one of them may be more vulnerable (to being fooled, crashed, etc) than the other. For example, one program might not check some header parameter and then it turns out it was invalid and it's going to end up doing a division by zero, or reading more data than it allocated memory for, or whatever. it just makes Win98's Notepad a limited program. MP3. Computer-assisted dispatch. The CAD system of a fire department on a busy day. The line at the bottom is about to be dispatched. (Note:addresses have been changed for privacy reasons.) Computer-assisted dispatch, also called Computer Aided Dispatch (CAD), is a method of dispatching taxicabs, couriers, field service technicians, mass transit vehicles or emergency services assisted by computer.

It can either be used to send messages to the dispatchee via a mobile data terminal (MDT) and/or used to store and retrieve data (i.e. radio logs, field interviews, client information, schedules, etc.). A dispatcher may announce the call details to field units over a two-way radio. Some systems communicate using a two-way radio system's selective calling features. CAD systems may send text messages with call-for-service details to alphanumeric pagers or wireless telephony text services like SMS. Methodology[edit] A typical CAD printout looks something like this based on the example above: Consoles[edit] Basic zone system[edit] Category:Mobile telecommunications standards. Automatic Packet Reporting System. APRS beacon transmitter with GPS receiver. Automatic Packet Reporting System (APRS) is an amateur radio-based system for real time tactical digital communications of information of immediate value in the local area.[1] In addition, all such data is ingested into the APRS Internet System (APRS-IS) and distributed globally for ubiquitous and immediate access.

Along with messages, alerts, announcements, and bulletins, the most visible aspect of APRS is its map display. Anyone may place any object or information on his or her map, and it is distributed to all maps of all users in the local RF network or monitoring the area via the Internet. Any station, radio, or object that has an attached GPS is automatically tracked. Other prominent map features are weather stations, alerts and objects and other map-related amateur radio volunteer activities including Search and Rescue and signal direction finding. History[edit] Network overview[edit] Positions/objects/items[edit] Status/messages[edit] OAuth. For MediaWiki's (the software used by Wikipedia) OAuth support, see mw:Help:OAuth OAuth is an open standard for authorization, commonly used as a way for Internet users to log into third party websites using their Microsoft, Google, Facebook or Twitter accounts without exposing their password.[1] Generally, OAuth provides to clients a 'secure delegated access' to server resources on behalf of a resource owner.

It specifies a process for resource owners to authorize third-party access to their server resources without sharing their credentials. Designed specifically to work with Hypertext Transfer Protocol (HTTP), OAuth essentially allows access tokens to be issued to third-party clients by an authorization server, with the approval of the resource owner. The third party then uses the access token to access the protected resources hosted by the resource server.[2] OAuth is a service that is complementary to and distinct from OpenID. History[edit] OAuth 2.0[edit] Security[edit] Uses[edit] Nationwide Mobile Data Computer Interoperability [Archive] - Police Forums & Law Enforcement Forums @ Officer.com. View Full Version : Nationwide Mobile Data Computer Interoperability Jim1648 I was talking to someone this evening that tells me that we might see nationwide interoperability in the future for our mobile computers.

I would probably like to see that, although I suspect that it might take quite some time for this to happen. In my county, I can message any other PD, but I have no means to check the State Patrol to see what calls they are on. Does anybody here already have statewide interoperability for mobile computers? Greenlead No, but I've been thinking about starting an open-source project to make it easier. Doublen I would love to see that, I think homeland security depends on it. Narco I don't see how it would ever be possible. I can't see a dept. who just spent a few million on a new set up spend a few more million to get on te same program as others. Bcoleman36 bcso974 Kentucky State Police has setup a state-wide infrastructure where any dept that buys MDT/MDC can attach to the network. Radio packet data terminal and method of determining internet interworking protocol address - US Patent 6404754 Claims. Claims What is claimed is: 1. A method of determining Internet interworking protocol address, comprising: transmitting mobile station packet calls from a mobile terminal of a mobile station to a radio network controller in a radio packet data network and registering as a packet data service option of the mobile terminal one of a simple interworking protocol (SIP) option, a mobile interworking protocol (MIP) option, and a unique interworking protocol (UIP) option in accordance with a response to the transmitted mobile station packet calls; establishing a point-to-point (PPP) link by calling data service packets in accordance with the option registered in the mobile terminal after the registration of the packet data service option and releasing a packet channel of the mobile terminal if a term of a PPP link timer of the radio network controller expires and a present state is a dormant-open state; and 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18.

DCS Netlink - Wireless Internet, Watchguard Training,  Internet Services, Managed Services, Web Design and "Anything Computers & Everything Networks" Law enforcement car computers. 5 Top Video Game Trends in 2010 :: Ultimate MMORPG Gaming Community & Trading Zone. Omnixx program. Public Safety Search - Police Communication Equipment, Mobile Solutions For Law Enforcement Officers. Products: In Car Computers - PoliceLink.

Real Time Operating System | Download Windows Embedded CE | Product Features. Professional Mobile Radio. Point to multi-point communications (as opposed to cell phones which are point to point communications)Push-to-talk, release to listen — a single button press opens communication on a radio frequency channelLarge coverage areasClosed user groupsUse of VHF or UHF frequency bands Introduction[edit] When private- or professional-mobile-radio (PMR) first started the systems simply consisted of a single base station with a number of mobiles that could communicate with this single base station. These systems are still in widespread use today with taxi firms and many others using them for communication. Now facilities such as DTMF and CTCSS provide additional calling selection.

Licenses are allocated for operation on a particular channel or channels. Selective calling[edit] Many systems operate with the remote or mobile stations being able to hear all the calls being made. Another widely used system is CTCSS, also referred to as subaudible tones or PL tones (a Motorola trademark).