Validation Search Results

How To: Change the operator in formula from drop-down in Excel

In this Excel magic trick video the tutor shows how to change operator in a formula from a drop down using Choose function. He shows a basic work book which can be downloaded from the internet for hands-on to the tutorial. In this trick the tutor shows how to include some operators in a drop down box of a cell and based on this drop down value change the operators in equations that are using this cell there by dynamically altering the equation and the value produced using the equation. For th...

How To: Pass info from one page to another with a query string

In this video tutorial, Chris Pels will show how information can be passed from one page to another using a query string. First, see how to construct a query string including variable names and values from information on a data entry form. Next, see how to access the query string information when the page is posted including how multiple query string variables are handled. As part of the server side processing of query string information, see how to implement validation for existence of query...

How To: Work with dropdown lists in Microsoft Office Excel

This how to video shows you how to use drop down lists in Microsoft Excel. This will be useful for stores and avoiding people ordering items that are not available. First, type the items in a column. Select them and then click in the name box. Type the name of the list. Note that it must be one word. Now, go back to the order sheet. Select the cell where you want the list to be placed. Go to data and select validation. On the settings tab, choose list and type in = and list name. You can pres...

Social Engineering: How to Use Persuasion to Compromise a Human Target

Social engineering makes headlines because human behavior is often the weakest link of even well-defended targets. Automated social engineering tools can help reclusive hackers touch these techniques, but the study of how to hack human interactions in person is often ignored. Today, we will examine how to use subtle, hard to detect persuasion techniques to compromise a human target.

How To: Perform Directory Traversal & Extract Sensitive Information

With all the web applications out on the internet today, and especially the ones built and configured by novices, it's easy to find vulnerabilities. Some are more perilous than others, but the consequences of even the slightest breach can be tremendous in the hands of a skilled hacker. Directory traversal is a relatively simple attack but can be used to expose sensitive information on a server.

How To: Flaw in Hilton's Rewards Program Allows You to Achieve Instant HHonors Gold Status for Free

Are you constantly traveling? Well, as a Hilton HHonors member, you can enjoy special treatment at all of their hotels and resorts. It's free to register, but the difficulty lies in climbing up their membership level. To reach Gold elite status, Hilton HHonors requires that you have a minimum of 20 stays, 40 nights, or 75,000 base points—all in one year. While this may very will be easily attainable for those with jobs that revolve around traveling, it's almost damn near impossible for the re...

News: Apple Fixes Group FaceTime Security Bug with Release of iOS 12.1.4, Available Now

Apple found itself in serious trouble last week when a teenager discovered a critical FaceTime bug that threatened the security of nearly every iPhone user. The bug enabled a user using Group FaceTime to access either the microphone or the camera of a recipient before they answered the call. According to Apple, the issues have been fixed in an iOS 12.1.4 update released Thursday, Feb. 7.

How To: Protect Yourself from macOS High Sierra's Glaring Empty-Password Security Flaw

There's a new macOS vulnerability that hackers within physical reach of your computer can use to gain root access to your system and accounts. Just by using "root" as the username and a blank password on a privilege escalation prompt, someone can install malware on your computer, access hidden files, reset your passwords, and more. Root access gives them the ability to do anything they want.

Dev Report: A Breakdown of the What Apple's New ARKit Can Do for iPhones & iPads

At Apple's yearly event, the World Wide Developers Conference, the tech giant finally announced their decision to enter the augmented reality space. Through adding basic AR functionality to the beta release of Xcode 9, the development environment for Mac computers, as well as their line of iOS devices, the company has said they understand the importance of the tech.

How To: Exploit Remote File Inclusion to Get a Shell

A simple security flaw can allow an attacker to gain a strong foothold with little effort on their part. When a web application permits remotely hosted files to be loaded without any validation, a whole can of worms is opened up, with consequences ranging from simple website defacement to full-on code execution. For this reason, RFI can be a promising path to obtaining a shell.

How To: Use Command Injection to Pop a Reverse Shell on a Web Server

Command injection is a technique used by hackers to execute system commands on a server, usually via a web application or some kind of GUI. This can happen when an application provides some sort of functionality to the user involving the use of system commands. When the input is not properly sanitized, commands not originally intended to be run are allowed to be executed.

SQL Injection 101: How to Avoid Detection & Bypass Defenses

It is often said that the best hackers remain unknown, and the greatest attacks are left undiscovered, but it's hard for an up-and-coming penetration tester or white hat to learn anything unless one of those factors is actually known or discovered. But the end goal here in our SQL injection lessons is to make that statement as true as possible for us when performing our hacks.