18/05/2017
Cryptography at Chimology
Cryptography at Chimology is a page set-up by a team of RVHS students. Check out our page to view interesting videos and funfacts about cryptography!
18/05/2017
US scientists 'hack' India electronic voting machines - BBC News Scientists at a US university say they have developed a technique to hack into electronic voting machines used in India.
13/11/2016
你不知道你是帮凶 在许多人的观念里,网络安全是企业的责任,只要企业做好防御措施,避免顾客资料或公司机密被盗并确保公司网站正常操作就行了。可事实上,一般消费者随时可能在不知情的情况下成为网络攻击的帮凶。
25/10/2016
Why smart devices are so vulnerable to cyber attacks - Business Insider
https://apple.news/A36ffHMTJSXa7rojkRmZtmA
Why smart devices are so vulnerable to cyber attacks "Smart" internet-connected devices such as webcams, kettles and baby monitors are "too dumb" to resist the kind of cyber-attack that brought down some of the world's most popular websites on Friday, experts have warned. Richard Sims, a product development consultant at the Technology Partnership, sa...
01/10/2016
You can now use an iPhone to log into a Windows 10 PC, Microsoft says Apple's iPhone isn't always a good pairing for Microsoft's Windows 10 PCs, but you'll be able to use the phone's biometric authentication features to log into PCs.
16/09/2016
500,000 'Pokémon Go' Players Were Tricked Into Downloading Malware It's more devious than anything Team Rocket could ever think up.
02/09/2016
iPhone and Mac users take note!
The flaw that allowed hackers to take over your iPhone affects your Mac, too - Business Insider
https://apple.news/Al4YfHmwYTsK00iECZ4yvSg
The flaw that allowed hackers to take over your iPhone affects your Mac, too A customer enters the new Apple store, which is the world's largest, on its opening day at Covent Garden in London Thomson Reuters If you have a Mac desktop or laptop, you need to update it right now. It turns out the major security hole that could let attackers take over iPhones affects Macs as wel...
24/08/2016
Ever wish to pass messages which makes no sense to an average joe? We have the solution for you - The Morse Code.
Morse code is a method of transmitting the plain text as a series of on-off tones, lights, or clicks that can be directly understood by a skilled listener or observer without special equipment.
So, the morse code works by replacing letters with dots and dashes on paper.
1. Every dot represent 1 beat while a dash represent 3 beats.
3. After every single dots or dash, there will be a pause/silence of 1 beat.
4. After every single word there will be a pause of 7 beats.
To allow better understanding, the length of each letter in Morse is relative inversely proportional to the letter's. frequency of occurrence in English. As such, the letter which appear the most is "E" hence its replacement is only a single "."
To type it out in text, (with reference to the table below), replace the letters with dots or dash while spaces between each letters and a slash between each word. For example, "hi there" will be:
•••• •• /- •••• • •-• •
Though it may seem tedious, once you have mastered the key, you may be able to make sense of the coded message. To learn the key in a more efficient and easy way, one can make use of the dichotomy diagram (ref. to picture) where each alphabet is branched out to one dot and one dash as seen in the picture below. Otherwise, start memorizing from the easiest (aka the shortest) letter
The morse code, though is named a type of cryptography, is used more in the form of a communication tool in the past rather than hiding messages. It enables long distance communications by transmitting signals in the form of electric signals through wires laid between stations
History of the morse code:
Morse code was critical for communication during World War II. It was also used as an international standard for communication at sea until 1999, when it was replaced by the Global MaritimeDistress Safety System.
The international Morse code distress signal
( · · · — — — · · · )
was first used by the German government in 1905 and became the standard distress signal around the world just a few years later. The repeated pattern of three dots followed by three dashes was easy to remember and chosen for its simplicity.
Aeronautical Navigational aids, such as VHF omnidirectional range (VOR)
and non-directional beacon (NDB), constantly identify in Morse code. Compared to voice, Morse code is less sensitive to poor signal conditions, yet still comprehensible to humans without a decoding device.
Morse code is most popular among amateur radio operators, although it is no longer required for licensing in most countries. Pilots and air traffic controllers usually need only a cursory understanding. Morse is therefore a useful alternative to synthesized speech for sending automated data to skilled listeners on voice channels. Many amateur radio repeaters, for example, identify with Morse, even though they are used for voice communications.
For the fun facts of life:
In 1844, Morse sent his first telegraph message, from Washington, D.C., to Baltimore, Maryland; by 1866, a telegraph line had been laid across the Atlantic Ocean from the U.S. to Europe.
Samuel Morse died in New York City at the age of 80 on April 2, 1872.
In 1843, Morse and Vail received funding from the U.S. Congress to set up and test their telegraph system between Washington, D.C., and Baltimore, Maryland. On May 24, 1844, Morse sent Vail the historic first message: “What hath God wrought!” The telegraph system subsequently spread across America and the world, aided by further innovations.
Further readings:
http://www.history.com/topics/inventions/telegraph
References:
History
15/08/2016
Hello, my fellow RVIANS looking at this post! Going to the library to study, looking for past year papers, or simply looking to print your documents? There are quite many instances where there is quite a long queue for the printer! Why not just take a few minutes off to take a look here!!!!!
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12/08/2016
Car Thieves Can Unlock 100 Million Volkswagens With A Simple Wireless Hack Car Thieves can wirelessly unlock practically every vehicle the Volkswagen Sold Since 1995
10/08/2016
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