Do you need SSN for KYC?

Excuse me, I'm curious about the process of Know Your Customer (KYC) in the cryptocurrency world. I've heard that some platforms require personal information, such as a Social Security Number (SSN), for verification purposes. Is it true that I need to provide my SSN for KYC when using cryptocurrency exchanges or wallets? If so, how secure is this information, and what measures are in place to protect it from potential breaches or misuse? I'm keen to ensure that my personal data remains SAFE and secure while engaging in cryptocurrency transactions.