Media sanitization is the process of removing or destroying the data stored on a media device, such as a hard disk, a flash drive, or a CD-ROM, to prevent unauthorized access or disclosure.
Media sanitization methods vary in their effectiveness and applicability, depending on the type and sensitivity of the data, the type and condition of the media, and the cost and feasibility of the method. For data with a high security categorization, which means that the data is classified or confidential and could cause severe damage or harm if compromised, the media sanitization methods that should be used are purge or destroy. Purge is a method that applies a strong magnetic field or a software algorithm to overwrite the data multiple times, making it unrecoverable by any means. Destroy is a method that physically damages or disintegrates the media device, making it unusable and unreadable. Clear or destroy is not a valid option, as clear is a method that applies a weak magnetic field or a software algorithm to overwrite the data once, making it unrecoverable by normal means, but not by advanced means. Clear or purge is also not a valid option, as clear is not sufficient for data with a high security categorization. Destroy or delete is also not a valid option, as delete is a method that removes the data from the file system, but not from the media device, making it recoverable by simple means.

A strongly typed programming language is a type of programming language that enforces strict rules and constraints on the data types and operations that can be used in the code. A strongly typed language prevents or detects errors such as type mismatch, type conversion, or memory allocation at compile time or run time, and ensures that the code executes safely and only as intended. A strongly typed language also supports features such as type inference, type checking, and type safety, which enhance the readability, maintainability, and security of the code. Examples of strongly typed languages are Java, C#, and Python. A strongly typed language is different from a weakly typed language, which is a type of programming language that allows more flexibility and leniency on the data types and operations that can be used in the code. A weakly typed language may perform implicit type conversion, type coercion, or type casting at run time, and may not detect or report errors until they cause unexpected or undesirable results. A weakly typed language may also have features such as dynamic typing, duck typing, or polymorphism, which enable the code to handle different types of data or objects at run time. Examples of weakly typed languages are JavaScript, PHP, and Perl. A strongly typed language is also different from a statically typed language, which is a type of programming language that assigns and checks the data types of variables and expressions at compile time. A statically typed language requires the programmer to declare the data types of variables and expressions explicitly in the code, and ensures that the code is consistent and compatible with the data types before execution. Examples of statically typed languages are C, C++, and Java. A statically typed language is also different from a dynamically typed language, which is a type of programming language that assigns and checks the data types of variables and expressions at run time. A dynamically typed language does not require the programmer to declare the data types of variables and expressions explicitly in the code, and allows the code to adapt and change the data types during execution. Examples of dynamically typed languages are Python, Ruby, and JavaScript.

Entering an automatically generated number from a hardware token would be the best option to implement multi-factor authentication (MFA) for a customer-facing application. MFA is a method of authentication that requires two or more independent factors to verify the identity of a user, such as something you know, something you have, or something you are. A hardware token is a device that generates a one-time password (OTP) or a personal identification number (PIN) that the user must enter along with their username and password to login. A hardware token provides a strong and secure second factor of authentication, as it is based on something the user has, and it is resistant to phishing, replay, or brute-force attacks. Geolocating the user and comparing to previous logins would not be a good option to implement MFA, as it is based on something the user is, which is a weak and unreliable factor of authentication, as it can be easily spoofed, manipulated, or inaccurate. Requiring a pre-selected number as part of the login would not be a good option to implement MFA, as it is based on something the user knows, which is the same factor as the username and password, and it does not provide any additional security or verification. Having the user answer a secret question that is known to them would not be a good option to implement MFA, as it is also based on something the user knows, and it can be easily guessed, forgotten, or compromised.

The Structured Query Language (SQL) implements Discretionary Access Controls (DAC) using the GRANT and REVOKE commands. DAC is a type of access control that allows the owner or creator of an object, such as a table, view, or procedure, to grant or revoke permissions to other users or roles. For example, a user can grant SELECT, INSERT, UPDATE, or DELETE privileges to another user on a specific table, or revoke them if needed.

Data lineage tracking documents and visualizes the origin, movement, and transformation of data as it flows through various systems, applications, and processes over time, providing organizations with visibility into where sensitive data originated, how it has been used and modified, and where it currently resides-valuable for both security risk assessment and regulatory compliance efforts.