1. IDN (Internationalized Domain Name) allows domain names in local languages using local characters. However, attackers can exploit similarities between characters from different alphabets or languages to conduct IDN homograph attacks for social engineering and phishing. 2. For example, the Greek letter "Alpha" looks similar to the Latin letter "a", so an attacker could register the domain www.αslanbank.com to spoof the legitimate domain www.aslanbank.com. 3. To prevent such attacks, commercial companies should proactively register common IDN variations of their domains containing similar-looking characters from other scripts or languages.