Does Kraken require SSN?

As a potential user of the Kraken cryptocurrency exchange, I'm curious about the verification process. Specifically, I'm wondering if Kraken requires Social Security Numbers (SSN) for user registration and account verification? This is a sensitive piece of personal information, and I'd like to know if Kraken handles it securely and whether it's a mandatory requirement for account setup. Understanding this information will help me make an informed decision about whether to proceed with my Kraken account creation. Could you please clarify Kraken's policy on the collection and use of SSNs?