fips mode

In ECB mode, the results of plaintext packet encryption are grouped directly as ciphertext, as shown in:When using ECB mode encryption, the same plaintext groupings are converted to the same cipher groupings, that is, we can interpret them as a large "plaintext grouping → ciphertext grouping" table, so the ECB mode is also known as the electronic cipher mode.ECB

Memento Memo Mode (behavioral mode)Backtracking of object statesThe state of the object is changed for no reason, how to backtrack and restore the object's state at a certain point?Motive (motivation)During the software build process, the state of some objects during the conversion process may require that the program be able to backtrack to the state of a point before the object, for some reason. If you us

1. Factory method mode. Defines an interface for creating objects, letting subclasses decide which class to instantiate. A factory method is an instantiation of a class that is deferred to its subclasses.Factory method Pattern class structure diagram:Realize:2. Simple Factory mode. Also known as the Static factory methods (static Factory method) mode. A simple fa

PHP design mode adapter mode, PHP design mode Adapter mode, you can encapsulate a completely different function interface into a unified API; Application example, PHP database operation has MySQL, mysqli, PDO three kinds, can be unified into the same adapter mode, similar s

PHP design mode decorator mode, PHP design mode Decorator mode, you can dynamically add the ability to modify the class. A class provides a feature that, if you want to modify and add additional functionality, the traditional programming pattern requires writing a subclass to inherit it and re-implement the method of

Tenth chapter: Façade modeOne: The role of façade mode Simplify existing APIs to make them easier to use Resolving browser compatibility issues Second: The nature of the façade modelthe essence of façade mode is to package existing APIs to simplify operationsThree: Two simple examples of façade patternsThe following example is a simple façade pattern for dealing with event compatibility is

Design Mode-singleton mode and observer ModeObserver mode example: in the game scenario, a little boy is thrown near many devils and exploded. Based on the power of the bomb, the blood volume of the devils after the explosion is calculated. Assuming that some devils have defensive equipment, some devils do not have any defense tools. Analysis: In this case, the o

Php design mode: Data Object ing mode; php design mode The Data Object ing mode maps objects and data storage. operations on an object are mapped to operations on data storage. Implement the Data Object ing mode in the code, implement an ORM class, and map complex SQL statem

"Preface" Today once again "big talk design mode" a book to take out, for the previous section of the preliminary discussion of the simple factory model and strategy model, have a better understanding. In accordance with the habit, or continue to comb the comb."Simple Factory mode": Encapsulation (data + algorithm) Features of the Simple factory model: The factory class in

Interpreter interpreter mode (behavioral mode)Motive (motivation)In the software construction process, if a particular area of the problem is more complex, similar patterns are repeated, if the use of ordinary programming to achieve will face very frequent changes.In this case, the problem of a particular domain is expressed as a sentence under some grammatical rule, and then an interpreter is constructed t

Create mode -- Multi-instance mode, create mode -- The multi-sample mode is generally divided into the multi-sample mode with an upper limit and no upper limit. We usually use the multi-sample mode with no upper limit to a new ob

Design Mode: construction mode; Design Mode ConstructionThe building mode is the object creation mode. The building mode can separate the internal appearance of a product from the production process of the product. Instead, a buil

Design Mode: Singleton mode and Design ModeSingle Instance, as its name implies, is a single instance 1. Advantages of Singleton Mode In Singleton mode, only one object is generated, which reduces system overhead. When an object requires a large amount of resources, such as reading the configuration file and generati

Introduction I learned the template method mode when I went to work on the first day and had no tasks. Here I learned how to sell it now. The template method gave me the feeling that I was familiar with it and I always felt that I was using it, at that time, I did not know that it was a template method. It was a sad reminder. On the first day of the year, eating is a big problem. It is hard to find a rice noodle shop with many people. We can only thin

Android design mode-singleton mode and android Design ModeAndroid design mode-in singleton mode, under what circumstances do you need Singleton mode? Some classes provide public functions for others to call and do not process the business logic. Classes are called by many

Simple factory mode: Creates a factory class, and the caller Passes parameters to the factory class to determine whether a specific instance is returned. First, let's look at the class chart. PS: in the days when I was a code Porter, I didn't need to draw pictures or even draw pictures. So I learned to draw pictures from scratch to deepen my understanding. 1 namespace designmodel. simple factory Mode 2 {3

This article mainly introduces three basic methods (factory mode, constructor mode, and prototype mode) for js to generate objects, which has some reference value. If you are interested, please refer to 1. factory Model The factory model is a well-known design model in the software engineering field. Because classes cannot be created in ECMAScript, function enc

Behavior mode Overview: Iterator: provides a method to sequentially aggregate elements of an object without exposing the internal representation of the object. Practical scenarios: 1. Access the content of an aggregate object without exposing its internal representation. 2. Supports multiple traversal of aggregate objects. 3. provides a unified interface (that is, multi-state iteration) for Traversing different aggregation structures ). Class diagra

Design Mode: Metadata mode and Design ModeMeta Mode Flyweight stands for lightweight. When I first came into contact with this term, I felt like a share model (sharing element), hahaha. The metadata mode is an implementation of the Object pool. What is an object pool? Do you understand the thread pool? The thread pool

Swift design mode: Object template mode and swift Design Mode Application scenarios:Raw data is tightly coupled with usage For example: var products = [("computer",10000,200),("book",10,2000)] func calculateAllStock(products: [(String,Int,Int)]) -> Int { return products.reduce(0, { (total, product) -> Int in return total + product.1*prod