Identifying Password Reuse Between Seperate Breaches
When an account is included in multiple breaches, identify if the leaked password is reused, or similar password used in individual breaches.
This would be interesting for individual accounts, but more useful when monitoring domains.
If an account is included within multiple breaches, but there is low/no password reuse/similarity then we can gain a level of comfort that the leaked credentials cannot be used further.
If however the account that is included in multiple breaches has used the same or similar password across those breaches we can prioritise taking action and changing passwords for non-breached systems.