App Security Interview Question Part II

Categories: APP security APP security

Ques 1: What is encryption and why is it important for web application security?

Ans. Data is changed through the procedure of encrypting into an unreadable as well as secure format.  To safeguard data from illegal access, a transformation is performed using an algorithm and a key.  Because it prohibits people without the required credentials from accessing sensitive data, it is crucial for online application security.  Moreover, encryption stops hackers from altering data as it is transmitted over the internet.

Ques 2: What is HTTPS and why is it important for web application security?

Ans. The Hyper Text Transfer Protocol (HTTP), the primary mechanism used throughout communication on the World Wide Web, now has a secure variant called HTTPS (Hyper Text Transfer Protocol Secure).  Because it encrypts the data exchanged between both the client (browser) and the web server, HTTPS is crucial for web application security.

Ques 3: What is a secure socket layer (SSL) and what is its purpose?

Ans. A technique called Secure Socket Layer (SSL) offers safe Internet communications for activities including web browsing, email, instant texting, and other file transfers. In addition to providing authentication to ensure that the two systems interacting are indeed the two intended parties, it employs encryption to safeguard the data being communicated between the two systems.

Ques 4: What is a transport layer security (TLS) and what is its purpose?

Ans. An encrypted communication technique called Transport Layer Security (TLS) is utilized between two systems, often a server and a client.  To make absolutely sure that information is intact and unable to be intercepted by outside parties, it is delivered via networks like the internet, encrypted using TLS.

Ques 5: What is a secure file transfer protocol (SFTP) and what is its purpose?

Ans. A network approach termed Secure File Transfer Protocol (SFTP) is used for remote file management, file transfers, and secure data access via secure networks.  It employs SSH (Secure Shell) as the foundation protocol and is a secure variant of File Transfer Protocol (FTP).

Moreover, a safe method of transferring files between two computers across an unprotected network is provided by SFTP.  In addition, it is employed to guarantee that information is sent securely and to prevent data from being captured by unauthorized parties.  Also, it serves as a safeguard against data corruption or tampering during transfer.

Ques 6: What is a virtual private network (VPN) and what is its purpose?

Ans. A virtual private network (VPN) allows remote users and websites to securely connect with one another across a public network, such as the internet.  In addition, it proposes a method for safely connecting to private networks via the open internet.

Even when using a public network, VPNs enable users to view websites and other content as if they were on a private network.  Moreover, they also offer a means of preventing user data from being viewed by networks that might be acting maliciously.  Using encryption and other security measures, a VPN connects two or more computers or networks securely to make sure that only authorized users can use the information and services.

Ques 7: What is two-factor authentication and why is it important for web application security?

Ans. A user must submit two distinct authentication methods to gain entry to a system or application using two-factor authentication (2FA).  Moreover, the same user is required to enter anything they know (such as a username and password) as well as something they have as an additional layer of security (like a physical token or a mobile device).  This kind of additional security measure guards against hostile actors accessing user accounts and the information and data of users.  Phishing attacks, account takeovers, and data breaches can all be prevented using 2FA.

Ques 8: What is password hashing and why is it important for web application security?

Ans. The method for transforming a password from plain text into such a scrambled code is called password hashing.  In addition, this particular type of code is known as a hash, adds an extra layer of security for online applications, and is incredibly challenging to decipher.

Due to the fact that it stops intruders from acquiring user passwords in plain text, it is crucial for web application security.  Additionally, it makes sure that even if an adversary gets their hands on the password’s hashed version, they cannot use it to enter the system.

Ques 9: What is salting and why is it important for web application security?

Ans. Passwords can be secured utilizing the salting approach, which includes adding random data (the salt) before the password is hashed.   As a result, it is more challenging for attackers to deduce credentials employing pre-generated hash tables.

Moreover, rainbow tables, which seem to be tables containing a list of credentials and their related hash values, are also avoided by salting.  The hash values remain unique and are unable to be utilized to deduce passwords when a salt is added.

Because it helps prevent login credentials from being compromised as a result of bad passwords or brute-force assaults, salting is crucial for web application security.

Ques 10: What is a security token and why is it important for web application security?

Ans. An electronic identification, known as a security token, is employed to verify a user’s identity and allow permission to use a web application. Since it assists in guaranteeing that only authorized individuals may access the program, it is crucial for web application security.

Moreover, security tokens are more highly safe than passwords since they are often created cryptographically and are challenging to forge. Security tokens may additionally be employed to store user information that can be used to customize the user’s experience, like preferences and settings.