Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
There are various types of cryptosystem which are as follows −Private Key cryptosystems − Symmetric encryption is also known as private-key encryption or secret-key encryption. It contains using the similar key for encryption and decryption. Encryption contains using an operation (an algorithm) to the data to be encrypted using the private key to create them meaningless.The main disadvantage of a secret-key cryptosystem is associated to the exchange of keys. Symmetric encryption depends on the swap of a secret (keys).Public-key cryptosystems − Public-key cryptosystems is also known as asymmetric cryptography. It is a type of cryptographic algorithms which needed two separate ... Read More
Authentication is the procedure which enables a sender and receiver of data to certify each other. If the sender and receiver of data cannot properly authenticate each other, there is no trust in the activities or data supported by either party.Authentication can include largely difficult and secure approach or can be very simple. The easiest form of authentication is the transmission of a shared password among entities wanting to authenticate each other.Authentication defines allowing the network to only receive the authorized users to have access to its resources. It provides the method where the claimed identifier is tested by the ... Read More
Authentication is the procedure of checking if a user or entity or device is who claims to be. In another terms, it is a set of verification and Identification. Authentication falls into three elements which are as follows −The knowledge factors − Something the user understand such as a password, pass phrase, or personal identification number (PIN), challenge response, design.The ownership factors − Something the user has wrist band, ID card, security token, cell phone with included hardware token, software token, or cell phone holding a software token.The inherence factors − Something the user is or does such as fingerprint, ... Read More
There are various techniques of Authentication which are as follows −Password-based authentication − It is the simplest approach of authentication. It needed the password for the specific username. If the password connect with the username and both details connect the system's database, the user should be strongly authenticated.Vault authentication − In vault systems, authentication appear when the information about the user or machine is checked against an inside or outside system. The typical authentication forms for these systems are appearing through API or CLI.Email authentication − There are several different approaches to email authentication. The typical used standards are SPF, ... Read More
There are various method of Authentication which are as follows −Biometrics − Biometrics is a term that defines the measuring unique individual characteristics including the retina, the iris, fingerprints or even the face. Today, the concept is usually used by most people to define a method for protecting computers and saved data requiring a user to endure a scan of the body part used for identification.While several systems need a fingerprint or retinal scan as a user password, systems that are serious about security frequently need a password and a biometric scan before open the computer or device.There are some ... Read More
Two-factor AuthenticationTwo-factor authentication (2FA) a type of multi-factor authentication (MFA). It is an approach of creating access to an online account or computer system that needed the user to support two different types of information.It is a security procedure that cross-verifies users with two multiple forms of identification, most generally knowledge of an email address and authentication of control of a mobile phone.2FA is frequently employed in online banking websites, social media platforms and ecommerce sites as an approach to harden access controls to the more responsive location of a web application including admin panels or areas that store credit ... Read More
Multi-factor authentication (MFA) is a security procedure that needed users to respond to requests to test their identities before they can access networks or other online software. MFA can use knowledge, control of physical elements, or geographic or network areas to prove integrity.Multi-factor authentication is a layered method to protecting information and applications where a system needed a user to present a set of two or more credentials to test a user’s identity for login.MFA operates by requiring more verification data is known as “authentication factors. It can ensure that digital users are who they say they are. These elements ... Read More
MFA is an authentication feature which enables the user to access a specific application, account or website only after supporting two or more verification evidences. In another words, it is an approach to ensure that the person attempting to log into an account is truly the owner of that account.Multi-factor authentication is generally known for supporting an additional defense and creating it more complex for an unauthorized person to access a network or database. It can implementing a strong MFA solution instantly secures information and IT resources against identity theft, account spoofing and phishing.There are various methods of Multi-factor authorization ... Read More
Suppose we have two numbers c and d. Amal has two numbers a and b initially both are zero. Amal wants to perform some operation on them. Before performing each operation, some positive integer k is picked, which is then used to perform one of the following operations −add number k to both a and b, oradd number k to a and subtract k from b, oradd number k to b and subtract k from a.We have to find the minimum number of operations needed to make a and b equal to c and d respectively. If not possible, return ... Read More
Suppose we have a string S with n digits. A number with exactly 11 digits is a telephone number if it starts with '8'. In one operation, we can remove one digit from S. We have to check whether we can make the string a valid phone number or not.So, if the input is like S = "5818005553985", then the output will be True, because we can make the string "8005553985" with 11 characters and first digit is 8.StepsTo solve this, we will follow these steps −m := size of S insert '8' at the end of S if if location of 8