jWebSocket Framework: is a new technology aiming to develop WebSockets based applications that provide high levels of speed, scalability, security and real-time work.

WebSocket:technology that provides a bidirectional and full-duplex communication channel over a single TCP socket. This protocol solves the limitations of HTTP, by establishing a full-duplex communication (TCP) between the client and server, replacing the half-duplex communication (HTTP). However, keeping the paradigm that only the client can establish the initial connection.

Full-Duplex:A full-duplex operation provides communication in both directions, and, unlike half-duplex, allows this to happen simultaneously.

Socket:method for communication between a client program and a server program on a network.

Half-Duplex:It means that the method or protocol for transmission of information is bidirectional but not simultaneously, and using the HTTP protocol the server can only send data after the client request them.

MD5:is a cryptographic algorithm reduction to 128 bits. It is a hash encryption function that accepts a string as input and returns a 128 bit number. This algorithm is used to transmit passwords through insecure media, because it is not possible to regenerate the original password data.

CAPTCHA:acronyms for Completely Automated Public Turing Test to Tell Computers and Humans Apart. Is a type of challenge-response test used in computing as an attempt to ensure that the response is generated by a person. The process usually involves a computer asking a user to complete a simple test which the computer is able to grade. These tests are designed to be easy for a computer to generate, but difficult for a computer to solve, so if a correct solution is received, it can be presumed to have been entered by a human. A common type of CAPTCHA requires the user to type letters or digits from a distorted image that appears on the screen, and such tests are commonly used to prevent unwanted internet bots from accessing websites.

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