The character of digital currency in imagination

1. 1. Low transaction cost
compared with traditional bank transfer, remittance and other methods, digital currency transaction does not need to pay fees to a third party, and its transaction cost is lower, especially compared with cross-border payment which provides high service charges to payment service providers
2. Fast transaction speed
the blockchain technology used in digital currency has the characteristics of decentralization, High anonymity
in addition to the point-to-point transaction without intermediary participation, one of the advantages of digital currency over other electronic payment methods is that it supports remote point-to-point payment, It doesn't need any trusted third party as an intermediary, and the two sides of the transaction can complete the transaction in a completely strange situation without mutual trust. Therefore, it has higher anonymity and can protect the privacy of traders, but it also creates convenience for cyber crime, which is easy to be used by money laundering and other criminal activities

2. First, digital currency is anonymous. Second, digital currency is programmable currency. Third, digital currency is cryptocurrency. Fourth, digital currency is algorithmic currency. Fifth, digital currency is autonomous currency. Sixth, the operation of digital currency is based on distributed network.

3. bitcoin, of course, is the hottest one. In addition to bitcoin, there are also:
1. Litecoin is similar to bitcoin, which is also an encrypted digital currency, and its price has risen sharply recently. It is a P2P open source digital currency, which can be regarded as a branch of bitcoin. However, although lightcoin is based on bitcoin protocol, it does not require very high computing power. It can also be mined using ordinary computers. Lightcoin's algorithm comes from the algorithm designed by Dr Colin Percival for tarsnap secure online backup service (backup for Linux and other open source operating systems)
2. Namecoin
namecoin is also based on bitcoin, which is another branch of open source. Namecoin is a distributed DNS protocol -- generally speaking, it can transform the website name (such as ifeng. Com) that can be understood by human into the address that can be understood by machine. As its own DNS, this kind of currency can operate outside the normal Internet, so it can break away from the control of ICANN
the monetary value and domain name of namecoin are stored in the user's blockchain records, limiting the total number to 21 million
3. Peercoin
peercoin is a peer-to-peer variant of bitcoin, which can improve mining efficiency and security, and improve safeguard measures to avoid group mining. Now, group mining has been considered as a potential defect of bitcoin. According to the statistics of emerging currencies by coinmarketcap.com, peercoin currently ranks fourth in the market value of digital currencies
4. Primecoin
primecoin is a cryptocurrency similar to bitcoin, but it uses a completely independent mining algorithm. Bitcoin uses the hashcash algorithm, while prime coin uses the long Cunningham chains to create the value of money - a sequence of prime numbers named after mathematician AJC Cunningham
in the process of bitcoin mining, as the amount of money goes on, the difficulty will increase sharply. But prime is different. Every time a primecoin is mined, the mining difficulty will increase slightly, and the process is much more stable< 5. Feathercoin

based on the design of litecoin, released in April 2013, can adjust the mining difficulty more frequently than litecoin. Feathercoin will be updated frequently, adding new features and improvements to eliminate malicious mining behavior

6. Novacoin

another P2P digital cryptocurrency. Novacoin is different from most other currencies in that it integrates a protection mechanism in the currency core, which can identify illegal mining activities

the total number of novacoin is limited to 2 billion, which is considerable. If necessary, the total can be adjusted upward

7, infinitech

published in June 2013. A by-proct of litecain. According to the mining situation and the total amount of money, infinite money can frequently adjust the mining difficulty ratio< Megacoin was only released in the fourth quarter of 2013, imitating bitcoin in the early stage. The total number of megacoin is limited to 42 million, which can be mined like other virtual currencies. Its biggest selling point is brand publicity, which other digital currencies lack< It was released in 2013 and is still in its infancy. In the security part of quarkcoin, nine independent loops are deployed and six different algorithms are used.

4. Knowledge based military, intelligent weapons, digital battlefield, information war and deterrence strategy have become the basic trend of military development in the 21st century, and the discipline comprehensiveness is more prominent. In the future, any solution to military war problems, science and technology problems, social development problems and environmental problems will be highly comprehensive, and almost all disciplines and specialties can become the research objects of national defense science and technology. In 1993, the U.S. Department of defense launched an action to jointly formulate a defense science and technology plan, and proposed to the Joint Chiefs of staff the 2010 joint operations vision, the joint operations science and technology plan, the defense technology field plan, and the basic research plan, covering almost all military related science and engineering fields. The basic research program alone covers 12 disciplines, including physics, chemistry, mathematics, computer science, electronics, materials science, mechanics, marine science, earth science, atmospheric space science, biological science and cognitive neuroscience. We should change our traditional thinking, build an advanced and reasonable discipline system of national defense science and technology, create a world-class university with our military characteristics, and enrich and develop national defense science and technology in accordance with the development mode of "military, comprehensive, research and open". The characteristics of military confrontation are distinct“ The rule of "there is a spear, there is a shield". Science and technology itself is a double-edged sword, while national defense science and technology have more distinctive military antagonism: reconnaissance and anti reconnaissance, stealth and anti stealth, jamming and anti-jamming, guidance and anti guidance, destruction and anti destruction, virus and anti-virus; Tank anti tank, missile anti missile, aircraft carrier anti aircraft carrier, satellite anti satellite; Air attack and anti air attack, landing and anti landing, blockade and anti blockade; Information attack and defense, electronic countermeasure, missile attack and defense, system of systems countermeasure; Weapon informatization and information weaponization, new concept weapon and new concept weapon all embody two aspects of one problem. New concepts of weapons emerge one after another. New concept weapon is a historical category, and its breakthrough is of milestone and epoch-making significance. In the era of cold weapons, it is difficult to divide attack and defense when short soldiers fight; In the era of hot weapons, the combination of attack and defense, long-range mobility; In the era of nuclear weapons, it is extremely powerful and can deter qu bing. In the future battlefield, there will be too many new concept weapons: kinetic energy weapons such as electromagnetic energy launchers and electrothermal guns, which use electric pulse power as energy to break through the speed limit of conventional artillery systems; Laser weapons, high-power microwave weapons, particle beam weapons and other directional energy weapons have changed the traditional thinking of "gun, gun and bullet", and realized the dream of "gun without bullet, zero hour flight, direct aiming"; Gene weapons can destroy a certain race or a certain kind of people; The infrasonic weapons hide the killing machine in the silent place, which makes it more difficult for people to defend; There are also micron / nano weapons, digital intelligent robot forces... The new concept of weapons is the broad sense of weapons, which regards all means beyond the traditional military field, but still can be used in war operations as weapons. In the era of information network, man-made stock disaster, hacker intrusion, false intelligence and power failure can be included in the new concept of weapons. The new concept of weapon provides direction for the new concept of weapon, and the new concept of weapon makes the new concept of weapon fixed. New concept weapon is the concentrated embodiment of military knowledge innovation and military technology innovation. In the era of knowledge military with the rapid development of national defense science and technology, new concepts of weapons beyond the modern era emerge in endlessly, and new concepts of weapons beyond the future will continue to emerge. The al-use of military and civilian is increasingly obvious. Modern high technology is almost all al-purpose technology, with the characteristics of strong versatility. The progress of science and technology in the field of information and the Kosovo war show that the boundary between the army and the people is becoming more and more blurred. The basic science and technology involved in national defense science and technology include infrared technology, low light level technology, laser technology, radar technology, optical fiber technology, photoelectric inertial technology, integrated optical technology, computer technology, communication technology, artificial intelligence technology, virtual reality technology, and management technology. Most of them are highly versatile technologies, It can support the development and transformation of many kinds of weapon systems, and has distinct al-use characteristics. Dual use, mutual promotion, is a direction. On the one hand, in the design phase of the new system, civil technology, procts, practical experience and capabilities should be used as much as possible, and the economic bearing capacity should be fully considered; On the other hand, many key technologies of national defense are being developed or matured in the commercial and international fields. Therefore, the proction of military procts and civilian procts will rely on the same instrial base as much as possible to give full play to the advantages of economies of scale and technological innovation of civilian instry. At the same time, the military system and national defense departments will also maintain stable scientific research funds, maintain investment in key defense science and technology fields, carry out high-quality basic research, cultivate future scientific and technological teams and "smart buyers", promote cooperation between scientific research institutions inside and outside the military, accelerate technology transfer, and selectively use technology to meet social needs.

5. Digital currency is an alternative currency in the form of electronic currency. It is an unregulated and digital currency, which is usually issued and managed by developers and accepted and used by members of a specific virtual community. It is different from the virtual currency in the virtual world, because it can be used for real goods and services transactions, not limited to online games. The early digital currency (digital gold currency) is a form of electronic currency named after the weight of gold. Today's digital currencies, such as bitcoin, lightcoin and ppcoin, are electronic currencies created, issued and circulated by means of check sum cryptography

digital gold currency is a kind of electronic currency named after the weight of gold. The typical unit of measurement for this currency is the Troy gram or troy ounces, although sometimes the golden Dinar is used. Digital gold currency is funded by gold storage without quota or decentralized quota. By January 2006, digital gold currency suppliers held more than 8.6 metric tons of gold as reserves, worth about $154 million.

6. There are two concepts involved here
1, currency digitization
2, decentralized blockchain digital currency (such as bitcoin), but the actual blockchain currency is not a real currency

the recent popular digital currency actually refers to the blockchain currency. You can search the Internet to learn about blockchain technology and other knowledge

7. Wuyi Lane (Liu Yuxi)