How to buy the equipment allocation center of Henan Public Secur
Publish: 2021-04-30 06:37:32
1. The proct m of PQ is called mole. Mole specifies the maximum number in the digital space, which is the boundary of the space. All numbers in the space should be less than mole m, including the encrypted message block. Therefore, if any message (A1, A2, A3...) exceeds m, it cannot be decrypted tangentially after encryption, because the number obtained after encryption and decryption is in this space, and it is impossible to obtain a number greater than m
but if the message a used for encryption is greater than m, the decrypted result plus K times m must be equal to a, because the encryption process is molar multiplication operation. The message a greater than m is divided by m first, and then the remainder is taken, which must be less than M. then all encryption operations are carried out for the remainder, If you want to restore a, you can add several times of m to the remainder of M. Decryption, then restore the remainder, get the remainder after restoring a, but also add several times the m on it
in essence, RSA encryption has a condition that message a must be less than m.
but if the message a used for encryption is greater than m, the decrypted result plus K times m must be equal to a, because the encryption process is molar multiplication operation. The message a greater than m is divided by m first, and then the remainder is taken, which must be less than M. then all encryption operations are carried out for the remainder, If you want to restore a, you can add several times of m to the remainder of M. Decryption, then restore the remainder, get the remainder after restoring a, but also add several times the m on it
in essence, RSA encryption has a condition that message a must be less than m.
2. No, this is a typical asymmetric encryption and decryption algorithm. It's the prefix of three people's names
in practical application, information is exchanged, a key is generated, and then symmetric encryption and decryption are performed. The symmetric algorithm is fast when it is changed in a few minutes
in practical application, information is exchanged, a key is generated, and then symmetric encryption and decryption are performed. The symmetric algorithm is fast when it is changed in a few minutes
3. This is easy to understand. Just look at it. There are examples
examples of RSA algorithm http://hi..com/lsgo/blog/item/5fd0da24d495666834a80fb8.html
I know that I have just answered another friend's question and posted it for you to see
http://..com/question/91261774.html?si=2
Title: when encrypting with RSA algorithm, the public key is (E = 7, n = 20), the private key is (E = 3, n = 20), and the message M = 3 is encrypted with the public key, What is the ciphertext
give the detailed process. Thank you
answer:
what you said:
n = 20
d = 7 public key
e = 3 private key
encrypt M = 3
M & # 39= M ^ D% n (the D power of M, then divide by n to get the remainder)
M & # 39= 3 ^ 7% 20 = 2187% 20 = 7 is equal to 7
for M & # 39 after encryption= 7 to decrypt
m = M & # 39^ E% n = 7 ^ 3% 20 = 343% 20 = 3 becomes 3 after decryption
the two primes you take are too small, so n is too small to work. Take at least 1024 digits
examples of RSA algorithm http://hi..com/lsgo/blog/item/5fd0da24d495666834a80fb8.html
I know that I have just answered another friend's question and posted it for you to see
http://..com/question/91261774.html?si=2
Title: when encrypting with RSA algorithm, the public key is (E = 7, n = 20), the private key is (E = 3, n = 20), and the message M = 3 is encrypted with the public key, What is the ciphertext
give the detailed process. Thank you
answer:
what you said:
n = 20
d = 7 public key
e = 3 private key
encrypt M = 3
M & # 39= M ^ D% n (the D power of M, then divide by n to get the remainder)
M & # 39= 3 ^ 7% 20 = 2187% 20 = 7 is equal to 7
for M & # 39 after encryption= 7 to decrypt
m = M & # 39^ E% n = 7 ^ 3% 20 = 343% 20 = 3 becomes 3 after decryption
the two primes you take are too small, so n is too small to work. Take at least 1024 digits
4. Brief introction: Songyuan branch of Jilin security equipment allocation center Co., Ltd. was established on May 18, 2005
legal representative: Liu Li
time of establishment: May 18, 2005
Business Registration No.: 220700000004152
enterprise type: branch of other limited liability company
Company Address: No. 3896, Qingnian Street, Ningjiang district, Songyuan City
legal representative: Liu Li
time of establishment: May 18, 2005
Business Registration No.: 220700000004152
enterprise type: branch of other limited liability company
Company Address: No. 3896, Qingnian Street, Ningjiang district, Songyuan City
5. RSA encryption algorithm is a typical asymmetric encryption algorithm, which is based on the factorization of large numbers. It is also the most widely used asymmetric encryption algorithm. In 1978, it was proposed by three scholars of MIT: Ron Rivest, ADI Shamir and Leonard Adleman
its principle is relatively simple, assuming that there are message sender a and message receiver B, the message can be encrypted and delivered through the following steps:
message sender a constructs the key pair, public key and private key locally
sender a sends the generated public key to receiver B
when B sends data to a, it encrypts it with the public key. After a receives the data, it decrypts it with the private key to complete a communication
on the contrary, when a sends data to B, it encrypts the data through the private key, and B decrypts the data through the public key after receiving it
because the public key is exposed by the sender a to the receiver B, there are some security risks in this way. If the public key is leaked in the process of data transmission, the data encrypted by the private key of a may be decrypted
if we want to build a more secure encrypted message delivery model, we need to build a set of key pairs for the sender and the receiver, and expose their respective public keys to each other. During message delivery, a encrypts the data through B's public key, B decrypts the message through B's private key, on the contrary, B encrypts the data through a's public key, After receiving the message, a decrypts it through a's private key
of course, there may be a hidden danger that data transmission can be simulated in this way, but the security can be further improved by digital signature and other technologies. Due to the existence of multiple asymmetric encryption and decryption, the efficiency problem caused by this method is more serious.
its principle is relatively simple, assuming that there are message sender a and message receiver B, the message can be encrypted and delivered through the following steps:
message sender a constructs the key pair, public key and private key locally
sender a sends the generated public key to receiver B
when B sends data to a, it encrypts it with the public key. After a receives the data, it decrypts it with the private key to complete a communication
on the contrary, when a sends data to B, it encrypts the data through the private key, and B decrypts the data through the public key after receiving it
because the public key is exposed by the sender a to the receiver B, there are some security risks in this way. If the public key is leaked in the process of data transmission, the data encrypted by the private key of a may be decrypted
if we want to build a more secure encrypted message delivery model, we need to build a set of key pairs for the sender and the receiver, and expose their respective public keys to each other. During message delivery, a encrypts the data through B's public key, B decrypts the message through B's private key, on the contrary, B encrypts the data through a's public key, After receiving the message, a decrypts it through a's private key
of course, there may be a hidden danger that data transmission can be simulated in this way, but the security can be further improved by digital signature and other technologies. Due to the existence of multiple asymmetric encryption and decryption, the efficiency problem caused by this method is more serious.
6. The director of the equipment department of the provincial public security department is at the department level
the provincial public security department is at the department level, the equipment department is at the department level, and the director is at the department level.
the provincial public security department is at the department level, the equipment department is at the department level, and the director is at the department level.
7. ASCII code can convert letters to integers.
Chinese uses Unicode code, which can be converted into byte array, and finally numbers
Chinese uses Unicode code, which can be converted into byte array, and finally numbers
8. Internal structure of the public security system:
the Ministry of public security has general office, police inspector, personnel training, publicity, economic crime investigation, public security management, border control management, criminal investigation, exit entry management, fire control, security, public information network security supervision, prison management, traffic management, legal system, foreign affairs, equipment finance, drug control, science and technology, anti-terrorism Bureau level organizations such as information and communication shall undertake relevant business work respectively. The Ministry of railways, the Ministry of communications, the General Administration of civil aviation, the Public Security Bureau of the State Forestry Administration and the anti smuggling Bureau of the General Administration of customs are listed in the order of the Ministry of public security, and accept the al leadership of the competent department and the Ministry of public security
the responsibilities of China's public security organs are: to prevent, stop and investigate illegal and criminal activities; Preventing and cracking down on terrorist activities; To maintain public order and stop acts endangering it; Manage traffic, fire control and dangerous goods; To manage household registration, ID card, nationality, entry and exit affairs, as well as matters related to foreigners' residence and travel in China; To maintain public order in the border areas; Guard the special personnel, important places and facilities stipulated by the state; Managing assemblies, processions and demonstrations; To supervise and manage the safety supervision of public information network; To guide and supervise the public security work of state organs, social organizations, enterprises, institutions and key construction projects, and to guide the public security work of the public security committee and other public security organizations.
the Ministry of public security has general office, police inspector, personnel training, publicity, economic crime investigation, public security management, border control management, criminal investigation, exit entry management, fire control, security, public information network security supervision, prison management, traffic management, legal system, foreign affairs, equipment finance, drug control, science and technology, anti-terrorism Bureau level organizations such as information and communication shall undertake relevant business work respectively. The Ministry of railways, the Ministry of communications, the General Administration of civil aviation, the Public Security Bureau of the State Forestry Administration and the anti smuggling Bureau of the General Administration of customs are listed in the order of the Ministry of public security, and accept the al leadership of the competent department and the Ministry of public security
the responsibilities of China's public security organs are: to prevent, stop and investigate illegal and criminal activities; Preventing and cracking down on terrorist activities; To maintain public order and stop acts endangering it; Manage traffic, fire control and dangerous goods; To manage household registration, ID card, nationality, entry and exit affairs, as well as matters related to foreigners' residence and travel in China; To maintain public order in the border areas; Guard the special personnel, important places and facilities stipulated by the state; Managing assemblies, processions and demonstrations; To supervise and manage the safety supervision of public information network; To guide and supervise the public security work of state organs, social organizations, enterprises, institutions and key construction projects, and to guide the public security work of the public security committee and other public security organizations.
9. The orange accessories of Ethereum are a little expensive
but the expensive ones are the accessories of Yingren.
after you buy them, you can directly open the warehouse
open the blade of heroes.
just click on the accessories transformation and equipment
but the expensive ones are the accessories of Yingren.
after you buy them, you can directly open the warehouse
open the blade of heroes.
just click on the accessories transformation and equipment
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