avalanche mitigation

Encrypted Cast-128AlgorithmAnd mypassword cracking Author: three cents a piece 1. Overview of Cast-128 encryption algorithms The cast-128 encryption algorithm is a des-like replacement network (SPNs) encryption system, it has good resistance to differential password analysis, linear password analysis, and password-related analysis. This encryption also has several other ideal features, including avalanche, strict

Sha isData EncryptionAlgorithmThis algorithm has been developed and improved by encryption experts over the years and has become one of the most secure and widely used Hash algorithms. The idea of this algorithm is to receive a piece of plain text, and then convert it into a section (usually smaller) ciphertext in an irreversible way, it can also be understood as a string of input codes (called pre- ing or information ), and convert them into output sequences with a short length and fixed digits

　　TVs Tube devices can be divided into unipolar and bipolar by polarity, i.e. unidirectional TVs and two-way TVs tubes.One-way TVs tube protection devices can only protect positive or negative pulses, while the bidirectional TVs tube protection device is connected to a protected line, one end of the ground, whether from the reverse or from the positive ESD pulse is released, more effectively protect the IC.The forward characteristic of unidirectional TVs is the same as that of ordinary zener dio

In the PHP development work very much uses the time-out processing to the time-out situation, I say several scenes: 1. Get data asynchronously if a backend data source gets unsuccessful then skips without affecting the entire page presentation 2. To ensure that the Web server does not have access to other pages due to poor performance of the page processing, some page operations are set 3. For some upload or uncertain processing time, you need to set the entire process to unlimited time, or any

equipment racks is pigtails. Pigtails have a diameter of about 4mm, and both ends are equipped with standard connectors.The interface connecting optical fiber or optical fiber is called optical port, and the interface connecting the optical fiber is called electrical port.Optical Transceiver: generally composed of optical receivers, optical transmitters, and electrical terminals. There are also internal alarm modules (when the device is faulty) and official telephones (when the switch is not us

period, even if there is an alternative route. The last technique to solve the slow convergence problem is the toxic reversal of poison reverse ). when a connection disappears, the router retains the route for several update cycles. However, when a route is broadcast, the cost of the route is set to be infinite. to improve the efficiency of the toxicity reversal method, It should be combined with triggered updates. the update trigger technology reduces the time for errors due to messages of goo

public network structure and adopt the update trigger technology, a broadcast can change the router routing table and lead to a new broadcast. if the second round of broadcast changes the route table, it will cause more broadcasts. this produces a broadcast avalanche. The use of broadcast technology may lead to a routing loop) and the use of suppression technology to prevent slow convergence, which can make the RIP routing protocol work very low on t

its complexity, the attack on TCP protocol is endless. Attacks are still divided into 2 categories, one of which is an attacker's improper communication with the target, and one in which an attacker inserts a packet into the TCP protocol stream. A classic attack in the first type of attack becomes a SYN avalanche, where an attacker sends a connection request with his own IP address and multiple port numbers, and the victim responds to the ACK packet

sends it to the other party;Data encryption: Due to the slow time of encrypting data, it is generally not used to encrypt data. 3. One-way encryptionIts basic algorithms are: MD5,SHA1 and so on. Features: Can only decrypt, cannot decrypt, can be used to extract data fingerprint, fixed-length output, avalanche effect (that is, the slightest change in the content of the data, may result in a huge change in output).Ii. use of OpenSSLOpenSSL i

how the F2FS three node matches the index file, but there is a very important detail: The index entry of the indirect node records the NID number (which is related to NAT) and directly records the block address directly in the index entry of node. Take the three-level index part of the figure (a) as an example:where node block 1) 2) belongs to the indirect node, the index entry is NID, 3), and 4 is a direct node, the address of the data block in the index entry. This design is designed to solve

5. Please describe the operating mechanism of the session in PHP (or other languages), what should be noted in the session of large websites?Operation mechanism: The client passes the session ID to the server, the server finds the corresponding file according to the session ID, the content of the file is deserialized when it is read, and the value of the session is obtained, and then serialized and then written.Attention:The session in a large web site should be added with a memcached cache serv