Digital currency encryption system RSA

1.

With the advent of digital currency, the encryption algorithm of currency is becoming more and more important. What are the types of passwords

classical cipher types mainly include transposition cipher and rearrangement of alphabetic order messages. For example, "Hello world" becomes "ehlol owrdl"

Diffie Hellman and RSA algorithms have been widely used except for the first public example of high quality public key algorithms. Other asymmetric key algorithms include Cramer schup cryptosystem, ElGamal encryption and various elliptic curve techniques

some well-known cryptosystems include RSA encryption, Schnorr Signature, El Gamal encryption, PGP and so on. More complex password systems include e-cash system, signcryption system, etc. Now more cryptosystems include interactive proof systems, such as zero knowledge proof, which is used for secret sharing

for a long time, information collection and law enforcement agencies have been interested in cryptography. The importance of secret communication is self-evident. Because cryptography promotes privacy protection, it also attracts great interest of cryptography supporters. Therefore, there is a history of controversial legal issues around cryptography, especially since the emergence of cheap computers makes it possible to widely use high-quality cryptography

nowadays, cryptocurrency transactions are semi anonymous, which makes them very suitable for a series of illegal activities, such as money laundering and tax evasion. However, the proponents of cryptocurrency often attach great importance to the anonymity of digital currency and think that it can protect the privacy of users. Some cryptocurrencies are more private than others

Cryptocurrency is a new type of digital asset, which is based on the network distributed on a large number of computers. This decentralized structure enables them to exist outside the control of the government and central authorities. The term "cryptocurrency" also comes from the encryption technology used to protect the network

blockchain is an organization method to ensure the integrity of digital currency transaction data, and it is an important part of many cryptocurrencies. Many experts believe that blockchain and related technologies will subvert many instries, including finance and law. Cryptocurrencies have been criticized for many reasons, including their use for illegal activities, exchange rate fluctuations and the vulnerability of the infrastructure that underpins them. However, digital currency is also praised for its portability, divisibility, anti inflation and transparency

2. If you are a policeman, you can take your police card to the public security department. There will be a police equipment allocation center next to the Public Security Department of each province, where you can buy almost everything except guns. Of course, you have to show your police card to sell it to you. There are many of these equipment beside the public security department. The Sales Department of the company can also buy them, but they also need certificates. Of course, the price is not cheap Other military procts shops are all textiles, which can only be seen but not used

3. Director Wang of equipment finance department of Henan Public Security Department

4. It was Guo fajie three years ago. Not now

5. The key generation of RSA system:
1. Select two large prime numbers, P and Q

2. Calculation: n = P * q (P and Q are two mutually different large prime numbers, P and Q must be kept secret. Generally, P and Q are required to be secure prime numbers, and the length of n is greater than 512 bits. This is mainly because the security of RSA algorithm depends on factorization of large numbers). There is Euler function (n) = (p-1) (Q-1)

3. Then randomly select the encryption key e, which requires that E and (P - 1) * (Q - 1) be mutually prime< Finally, Euclid algorithm is used to calculate the decryption key D, which satisfies de ≡ 1 (MOD) φ( n)) Where N and D are also coprime. The numbers E and N are the public key and d the private key. The two prime numbers P and Q are no longer needed and should be discarded and not let anyone know< Encryption and decryption algorithm:

1. When encrypting information m (binary representation), M is divided into equal length data blocks M1, M2,..., MI, block length s, where 2 ^ S & lt= n. S as large as possible

2. The corresponding ciphertext is: CI ≡ Mi ^ e (MOD n) (a)

3. When decrypting, the calculation is as follows: Mi ≡ CI ^ D (MOD n) (b) RSA can be used for digital signature, and the scheme uses (a) signature and (b) verification.

6. Brief introction: Yanbian branch of Jilin security equipment allocation center Co., Ltd. was established on May 25, 2006. Its main business scope includes security equipment, seal materials, seal equipment, security procts, photographic equipment, radio walkie talkie, fire fighting equipment, clothing, seal, logo, etc
legal representative: Cong Limei
time of establishment: May 25, 2006
Instrial and Commercial Registration No.: 22240000015676
enterprise type: branch of limited liability company (invested or controlled by natural person)
Company Address: 116 Tianchi Road, Yanji City

7.

1. The main responsibilities of the Management Office of the prison are as follows:

to formulate the policies, systems and regulations of the prison management, and to be responsible for supervision and inspection; To guide the public security supervision places such as detention centers, detention centers, ecation centers, compulsory isolation drug treatment centers, drug rehabilitation centers and Ankang hospitals to carry out the work of good management, ecation transformation, correction and treatment, deep excavation of crimes, information construction, construction guarantee, life hygiene and police team construction of public security supervision

master the management information of the prison, carry out countermeasure investigation and situation analysis, check and guide the public security supervision places to do a good job in safety prevention, and protect the legitimate rights and interests of the supervised personnel according to law

It is stipulated in the second paragraph of Article 2 of the regulations on supervision that the public security organs of local people's governments at or above the county level shall be responsible for performing their ties and responsibilities to the units of public security organs at the corresponding level, the public security organs at lower levels and the people's police To supervise the exercise of functions and powers and the observance of discipline, and to be responsible to the supervisory organ of the public security organ at the next higher level and the chief executive of the public security organ at the same level. "

the directors of these six departments are all at the department level

the Public Security Department of Henan Province is a functional department in charge of the public security work of the whole province under the people's Government of Henan Province, which is under the al leadership of the provincial government and the Ministry of public security. All cities and counties (county-level cities and districts) have public security bureaus (sub bureaus) and police stations in towns, townships and streets. The Public Security Bureau (sub Bureau) and the local police station shall be under the leadership of the people's government at the same level and the public security organ at a higher level respectively

extended data

the director belongs to the county department level. According to this, the department level is the county level, with the section chief below and the Department Director or director above. A county magistrate is equivalent to a chief. In some cases, the directors belong to the deputy county level. For example, the directors of municipal procuratorates and many deputy department level units belong to the deputy county level according to the national regulations

generally, there are directors in each department of a military level unit, such as the director of operations in the military command, the director of cadres in the military political department, and the director of health in the military logistics department, while each department of a corresponding division level unit can only have section heads, such as the director of information in the division command, the director of organization in the division political department, and the director of transportation in the division logistics department. The general level of the chief of a unit is from the regiment level to the deputy division level

8.

there is no telephone number of registered residence in the public telephone Department announced by the Henan Provincial Public Security Bureau. p>

Henan Provincial Public Security Department public telephone number

provincial public security department switchboard: 0371-65991155

provincial public security department petition office: 0371-65882231

Provincial Public Security Department Traffic Police Corps: 0371-65882461

provincial public security department anti drug Corps: 0371-65882906

provincial public security department public security corps: 0371-65882301

provincial public security department high speed Corps: 0371-68208110

Provincial Public Security Department Exit Entry Administration Bureau of security department: 0371-65882435

supervision team of Henan Provincial Public Security Department: 12389

fire brigade of Henan Provincial Public Security Department: 0371-65923119

extended information:

internal organs of Henan Provincial Public Security Department

Office (with the brand of police order department)

· economic crime investigation team

· public security management team

· prison management department

· criminal investigation team

· anti drug team

· Traffic Administration Bureau

· exit Entry Administration Bureau

· public information network security supervision team

· Science and Technology Department

· legal department

· complaint and complaint department

· equipment and finance department

· Political Department

· public security frontier defense team

· public security fire brigade

· Security Bureau

· Party committee

· Discipline Inspection Commission

· police supervision office

reference: Henan Public Security Department