A web service provides an interface for machine-to-machine or application communication over computer networks such as the Internet. In this process, data is exchanged and functions are called on remote computers (servers). Each web service has a Uniform Resource Identifier (URI) that uniquely identifies it. In addition, depending on the implementation, a web service contains an interface … [Read more...]
Different Types of Virtual Marketplace
In our earlier article, we have discussed about Virtual Marketplace (Electronic Marketplaces). Marketplaces can be described from three different pages based on the companies that initiate the marketplace. As with all electronic business models that support trade relationships, these are buy-side, sell-side, and neutral marketplaces. The operator structure has a significant influence on the … [Read more...]
What is Virtual Marketplace
A virtual marketplace, also known as an electronic marketplace (EMP), is a term used in the field of e-business. It represents a virtual place/market space within a higher-level data network within which virtual business transactions are carried out, which can be supported by the marketplace operator (as a third party) at any stage of the coordination process with the help of information-oriented … [Read more...]
Credit Card Fraud: Basic Details
Credit card fraud is a form of white-collar fraud in which forged or stolen credit card information is used to cause financial harm to account holders and/or merchants involved. In addition to the physical theft of the card, for example by pickpockets, credit card details are increasingly being stolen using electronic methods. To do this, the perpetrators make use of various possibilities, such … [Read more...]
What is Transaction Processing
In computer science, a transaction is a sequence of program steps that are regarded as a logical unit because they leave the data stock in a consistent state after error-free and complete execution. Therefore, a transaction is particularly required to be executed either completely and error-free or not at all. Transactions are mostly used in database systems. Failed transactions must be … [Read more...]
What is PCI DSS Compliance
The Payment Card Industry Data Security Standard, commonly abbreviated to PCI or PCI-DSS, is a set of rules in payment transactions that relates to the processing of credit card transactions and is supported by all major credit card organizations. The current version of PCI-DSS is: V4.0 from March 2022. Merchants and service providers who store, transmit, or process credit card transactions … [Read more...]
What is Association Analysis
Typical tasks of data mining are Outlier Detection, Cluster Analysis, Classification, Association analysis, Regression analysis. These tasks can be roughly divided into observation problems (outlier detection, cluster analysis) and forecasting problems (classification, regression analysis). Association analysis refers to the search for strong rules. These consequent association rules describe … [Read more...]
What We Mean By Frontend and Backend
The terms frontend and backend are used in various places in information technology in connection with a classification of shifts. Typically, the frontend is closer to the user, the backend closer to the system. In some cases, this interpretation is not applicable, but the principle is that the frontend is closer to the input and the backend is closer to the processing. In the case of … [Read more...]
The gpg-agent in GnuPG
The gpg-agent is an important part of GnuPG that plays a similar role to the ssh-agent in OpenSSH. It has been integrated into the system as of GnuPG version 2.0.x and performs several tasks related to the management of keys and passphrases. One of the main functions of the gpg-agent is to store private key passphrases in memory for a certain period of time. This eliminates the need to re-enter … [Read more...]
What is GNU Privacy Guard (GnuPG)
GNU Privacy Guard, abbreviated GnuPG or GPG, is a free cryptography system. It is used to encrypt and decrypt data, as well as to generate and verify electronic signatures. The program implements the OpenPGP standard and was developed as a replacement for PGP. Versions 2.0 and later also implement the S/MIME and PGP/MIME standards. By default, GnuPG uses only patent-free algorithms and is … [Read more...]
How Key Server Works
A key server provides access to public keys, which are used in asymmetric cryptosystems to send encrypted messages to a person, such as by email, or to verify their signatures. In particular, a keyserver provides a convenient, though not always cryptographically secured, way to update keys, which is necessary to check whether a key is still valid or has been revoked. Many of these servers are … [Read more...]