Security
So, you have confidence that you are safe from attackers who wreak havoc with authentication weaknesses? Think again or at least consider recent research findings. Five carriers used insecure authentication challenges—insecurity ...
Security
A week after a malicious virus infected its network, the London-based foreign currency exchange company Travelex had yet to restore digital sales and was reported infected with ransomware by hackers threatening to release ...
Jan 8, 2020
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2
Engineering
For the uninitiated in biological computing, the ZDNet headline may have suggested a language processing experiment gone haywire: "Test tube DNA computer calculates the square root of 900."
Security
Ibrahim Balic has become a name Twitter will certainly remember. The researcher discovered a flaw in a Twitter Android app that resulted in the sorry gift of matching 17 million phone numbers, when he uploaded them, with ...
Internet
As US lawmakers head home without agreeing on consumer privacy legislation, a new California law is set to become the de facto national standard, potentially leaving consumers and businesses confused over rules for personal ...
Dec 22, 2019
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7
Internet
A Ukrainian security researcher reported finding a database with the names, phone numbers and unique user IDs of more than 267 million Facebook users—nearly all U.S.-based—on the open internet. That data was likely harvested ...
Dec 20, 2019
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34
Internet
Hovering airborne vehicles could connect smart sensors to the internet of things.
Dec 12, 2019
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15
Security
Some of your text messages may have been left exposed on the internet for the world to see.
Dec 2, 2019
0
120
A Milwaukee-based company that provides technology services to more than 100 nursing homes nationwide is the victim of a ransomware attack, and hackers are demanding $14 million before they'll restore the company's access ...
Nov 25, 2019
0
4
Security
Two security sleuths last month discovered an enormous amount of data that was left exposed on a server. Data found on the server belonged to around 1.2 billion people.
A number is a mathematical object used to count and measure. In mathematics, the definition of number has been extended over the years to include such numbers as zero, negative numbers, rational numbers, irrational numbers, and complex numbers.
Mathematical operations are certain procedures that take one or more numbers as input and produce a number as output. Unary operations take a single input number and produce a single output number. For example, the successor operation adds one to an integer, thus the successor of 4 is 5. Binary operations take two input numbers and produce a single output number. Examples of binary operations include addition, subtraction, multiplication, division, and exponentiation. The study of numerical operations is called arithmetic.
A notational symbol that represents a number is called a numeral. In addition to their use in counting and measuring, numerals are often used for labels (telephone numbers), for ordering (serial numbers), and for codes (e.g., ISBNs).
In common use, the word number can mean the abstract object, the symbol, or the word for the number.
This text uses material from Wikipedia, licensed under CC BY-SA
