Homograph attacks, also known as Internationalized Domain Name (IDN) homograph attacks, are a type of cybersecurity threat where an attacker leverages the visual similarity between different characters to deceive the victim. The term 'homograph' refers to words that appear alike but have different meanings or origins, and in this context, it relates to how different characters from various languages or scripts can appear indistinguishable on a digital platform.
For example, consider the domain names "bank.tld" and "post.tld". At first glance, they seem trustworthy. However, a homograph attack could replace the Latin 'a' in "bank.tld" or the 'o' in "post.tld" with Cyrillic characters that look identical to the untrained eye, creating visually identical but malicious websites.