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CISC VS RISC computers (all details)

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CISC Introduction            The term "CISC" (complex instruction set computer or computing) refers to computers designed with a full set of computer instructions that were intended to provide needed capabilities in the most efficient way. Intel's   Pentium   microprocessors are CISC microprocessors. CISC is a   processor design   where single   instructions   can execute several low-level operations (such as a load from   memory , an arithmetic   operation , and a   memory store ) or are capable of multi-step operations or   addressing modes   within single instructions. The primary goal of CISC architecture is to complete a task in as few lines of assembly as possible. This is achieved by building processor hardware that is capable of understanding & executing a series of operations, this is where our CISC architecture introduced. T...
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Google Dorks for sql injection | new 2017 |

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what are Auxiliary Storage Devices ? (squential vs Random auxiliary storage)

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              Auxiliary storage, secondary storage, or external storage are devices that store noncritical system data like documents, multimedia and programs, which are used whenever they are required. These files are invoked from the auxiliary storage when needed and then transferred to the primary storage so that the CPU can process them. The results of the process can also be sent back to the auxiliary storage for later retrieval. These storage devices hold data and programs for future use and are considered nonvolatile storage that retains information even when power is not available. The best example of auxiliary storage is hard disk drives and optical storage media like CDs, DVDs, and Blue ray. Other auxiliary storage belongs to the peripheral devices category as well, such as flash drives and any type of memory card. ž   Auxiliary storage devices can be categorized in two types based on data access.  1. Sequential Access ...
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HOW BIOMETRIC SYSTEMS WORKS?

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1.    HOW BIOMETRIC SYSTEMS WORKS?
Instead of using something you have (like a key) or something you know (like a password), biometrics  you are to identify you. Biometrics can use physical characteristics, like your face, fingerprints, irises or veins, or behavioral characteristics like your voice, handwriting or typing rhythm. Unlike keys and passwords, your personal traits are extremely difficult to lose or forget. They can also be very difficult to copy. For this reason, many people consider them to be safer and more secure than keys or passwords.



Biometric systems can seem complicated, but they all use the same three steps:
·         Enrollment: The first time you use a biometric system, it records basic information about you, like your name or an identification number. It then captures an image or recording of your specific trait.
·         Storage: Contrary to what you may see in movies, most systems don’t store the complete image or recording. They instead analyze your trait and translate it into a code or graph. Some systems also record this data onto a smart cardthat you carry with you.
·         Comparison: The next time you use the system, it compares the trait you present to the information on file. Then, it either accepts or rejects that you are who you claim to be.
Systems also use the same three components:
·         A sensor that detects the characteristic being used for identification.
·         A computer that reads and stores the information.

  • Software that analyzes the characteristic, translates it into a graph or code and performs the actual comparisons.

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