If you want to keep the link secret, here's a public key you can encrypt the link to:
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAs+Zefow5vk22331dfQD/ VB/l8CbDNx+fo3r4MUGuOSVBnq2U2mEE0Q91oGSeSluuq7OHRuaZ0O3fKi793+ne LH41NNH8Yn9Dn6dyvyxyM2+mXa7g6pxhb2fjhUl2Sp8DhcaxKlpHSGY0B9sJGu7H oBiFzO3wd/GO0mI0wdW+/7SpqaidjrLiyA2Lftdo3IrVqHCQL0CqbmFC1xK3kAKE xIgWTA07HG3AyJpyUp1tRNP70czWn6Pl9pIufjalgZPjeNNej+R6q7WKLfH8gBZR lWEtsQnag53fyjrn2LySAbXrdRNTXoGecAliONSV6atmiqr1pa6iH6xfPFH+ebON vwIDAQAB -----END PUBLIC KEY-----
Or, if all of that is too complicated how do you feel about https://filetea.me/?