Introduction Domain squatting or URL hijacking is a straightforward attack that requires little skill. An attacker registers a domain that is similar to the target domain and hopes that a user accidentally visits the site. For example, if the domain is example.com, then a typo-squatter would register similar domains such as common misspelling: examples.com misspellings based on omitted letters: exampl.com misspellings based on typos: ezample.com a different top-level domain: example.