To securely transfer sensitive information to someone else, there are a few key steps you should consider:

1. Verify the Email Address: Confirm that you have the right email address for the intended recipient and that it is from a secure source.
2. Ensure Device Security: Make sure your device is secure and protected with a password before handling any sensitive information.
3. Encrypt Files: After taking the steps to verify the recipient and secure your device, you can encrypt files before transferring them.
4. Send Data Securely: Use secure transfer systems like end-to-end encryption or virtual private networks to send data online.
5. Audit Data Security: Make sure you audit and manage data security on a regular basis.