- [ ] Use Personal-Info-Based Identifiers ### Explanation Companies do have a universal way to create a maintain credentials of their employees, that include creation of their logins (and most often email addresses) based on first names, last names and patronymic (rarely) with some pattern. Knowing that pattern you can guess name of a person/login/email. ![[username-patterns.png]] Typical patterns of usernames are built from first/last names. w - names, c - first letters, d - digits. More details in the paper [How Unique and Traceable are Usernames?](https://arxiv.org/pdf/1101.5578.pdf). ### Input - full name, optionally DOB ### Output - logins (e.g. for email addresses) ### Examples ivanov2000, work logins as a.b.ivanov ### Tools {{some links to tools}} ### Types {{ business | technical | behavioural }} ### See also - {{internal links to similar techniques}} ### Weakness [[SOWEL-8. Using Nicknames]]