computer viruses and email attachments
Viruses and Email Attachments
... to data that your modem sends and receives to get email addresses from your incoming and outgoing email, Web pages, and files in your Internet cache folder. Many viruses also include their own ... [ Team LiB ] Viruses and Email Attachments Some people like to send out joke programs to their friends and opening these is risky. You have no way of knowing ... especially with email attachments. You know what viruses are, but what are trojan horses and spyware? Trojan horses are small programs that permit hackers to take control of your computer. At...
Ngày tải lên: 28/10/2013, 13:15
Computer Viruses and Malware phần 1 pps
... viruses and worms, and its countermeasures. The next chapter lays the groundwork with some basic definitions and a timeline of malware. Then, on to viruses: Chapters 3, 4, and 5 cover viruses, ... course on computer viruses and malicious software to senior undergraduate and grad- uate students at the University of Calgary. It's been an interesting few years. Computer viruses are ... propagation. It is prudent to look for threats to all computers, not just to your own. 6 COMPUTER VIRUSES AND MALWARE On the other hand, a defender wants to do one of two things. First, the...
Ngày tải lên: 14/08/2014, 18:20
Computer Viruses and Malware phần 2 ppsx
... hard-to-find, innovative, and adaptive, qualities that can be used by computer viruses too ^ Traditionally, viruses can propagate within a single computer, or may travel from one computer to another ... discovering these details is unusual. 16 COMPUTER VIRUSES AND MALWARE access and the costs incurred to clean up from it. He was fined, and sentenced to probation and community service.^ Chapter 7 ... a disk, binary code 12 COMPUTER VIRUSES AND MALWARE in applications, and interpreted code. It also includes source code, like ap- plication scripting languages, and code that may require...
Ngày tải lên: 14/08/2014, 18:20
Computer Viruses and Malware phần 3 ppt
... diverge. 42 COMPUTER VIRUSES AND MALWARE start: rl = 12 r2 = 34 r3 = rl + r2 => LI: r2 = 34 goto L2 start: rl = 12 goto LI L2: r3 = rl + r2 The instructions executed, and their ... to work with known and unknown viruses, or using virus-specific methods which only work with known viruses. (Virus-specific methods may catch unknown variants of known viruses, however.) The ... this classification, then disinfec- tion and related issues, virus databases and virus description languages, and some miscellaneous short topics. Viruses 41 Instruction reordering. Instructions...
Ngày tải lên: 14/08/2014, 18:20
Computer Viruses and Malware phần 4 pps
... polymorphic viruses. A histogram can also be used to detect metamorphic viruses by comparing the emulation histogram to histograms of known metamorphic viruses. ^^^ 64 COMPUTER VIRUSES AND MALWARE ... hash table 80 COMPUTER VIRUSES AND MALWARE Static heuristics • Pro: Static heuristic analysis detects both known and unknown viruses. • Con: False positives are a major problem, and a detected ... high operating speeds and low resource requirements. They detect known and unknown viruses. ^^^ • Con: Detection only occurs after a virus has infected the computer, and the source of the infection...
Ngày tải lên: 14/08/2014, 18:20
Ebook Fundamentals of computer organization and architecture (2005)
Ngày tải lên: 19/09/2013, 15:53
Ebook computer organization and design 4th edition oct 2011 new
Ngày tải lên: 19/09/2013, 15:53
William Stallings Computer Organization and Architecture P1
... I/O • Devices and memory share an address space • I/O looks just like memory read/write • No special commands for I/O (No I/O instruction) ü Large selection of memory access commands available § ... spaces • Need I/O or memory select lines • Special commands for I/O üLimited set Interrupt Driven I/O Basic Operation § CPU issues read command § I/O module gets data from peripheral whilst CPU ... identifier § CPU commands contain identifier (address) Design Issues § How do you identify the module issuing the interrupt? § How do you deal with multiple interrupts? • i.e. an interrupt handler being...
Ngày tải lên: 05/11/2013, 22:15
Working with Categories and Email
... LiB ] Working with Categories and Email Outlook supports categories on all items and, although no one thinks twice about using them on calendars, tasks, and contacts, categories aren't ... Rules Wizard, open the Rules Wizard using Tools, Rules and Alerts, New Rule: 1. Create a blank rule to check messages when they arrive and choose your conditions. For this example, we'll ... screen and select the contacts the rule will apply to. Click Next when you're finished adding addresses. 3. Select the action Assign It to the Category Category. Edit the rule description and...
Ngày tải lên: 07/11/2013, 06:15
Tài liệu The Little Black Book of Computer Viruses docx
... of Computer Viruses The Basics of the Computer Virus A plethora of negative magazine articles and books have catalyzed a new kind of hypochondria among computer users: an unreasonable fear of computer ... was popular in the late seventies and early eighties as an operating system for microcomputers based on the 8080 and Z80 microproc- 22 The Little Black Book of Computer Viruses users on it. For starters, ... computer viruses. This hypochondria is pos- sible because a) computers are very complex machines which will often behave in ways which are not obvious to the average user, and b) computer viruses...
Ngày tải lên: 09/12/2013, 17:15
Tài liệu William Stallings Computer Organization and Architecture P2 pptx
... Swapping Advantages of Segmentation § Simplifies handling of growing data structures § Allows programs to be altered and recompiled independently, without re-linking and re-loading § Lends itself to sharing ... Dynamic Partitioning Process States Objectives and Functions § Convenience • Making the computer easier to use § Efficiency • Allowing better use of computer resources Bonus § We do not need all ... Systems § Allow users to interact directly with the computer • i.e. Interactive § Multi-programming allows a number of users to interact with the computer Process Scheduling Process Request End Long-Term Queue Short-Term Queue CPU I/O...
Ngày tải lên: 12/12/2013, 09:15
Tài liệu William Stallings Computer Organization and Architecture P4 docx
... some location depending on decision William Stallings Computer Organization and Architecture Chapter 9 Instruction Sets: Characteristics and Functions Instruction Representation § In machine ... instruction and different addresses • e.g. VAX Number of Addresses (a) § # of address allowed in an instruction § Decide the categories of processor architecture § 3 addresses • Operand 1, Operand 2, ... Increment (a++) • Decrement (a ) • Negate (-a) Standard …What Standard? § Pentium (80x86), VAX are little-endian § IBM 370, Moterola 680x0 (Mac), and most RISC are big-endian § Internet is big-endian •...
Ngày tải lên: 12/12/2013, 09:15
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