Text String

A text string is a sequence of characters (numbers and letters) that are treated as data.

Text strings have created security issues in programs due to the ability of some randomly-generated strings to crash software. For example, the string, "U+0C1C U+0C4D U+0C1E U+200C U+0C3E" crashed iOS systems if they were sent in a text message. While this isn't particularly malicious, hackers will sometimes use these text strings to penetrate real security vulnerabilities in various companies' software. Even large companies who do extensive security testing are not always able to find every bad text input.

References:
 * 1) French, T. (n.d.). Here's How Text Strings Are Used in Excel. Retrieved April 11, 2018, from https://www.lifewire.com/description-of-text-string-3124029
 * 2) Khandelwal, S. (2015, May 30). How to Fix iPhone Crash Text Message Bug. Retrieved April 11, 2018, from https://thehackernews.com/2015/05/iPhone-Crash-text.html