21 CFR § 1311.30 - Requirements for storing and using a private key for digitally signing orders.

(a) Only the certificate holder may access or use his or her digital certificate and private key.

(b) The certificate holder must provide FIPS-approved secure storage for the private key, as discussed by FIPS 140–2, 180–2, 186–2, and accompanying change notices and annexes, as incorporated by reference in § 1311.08.

(c) A certificate holder must ensure that no one else uses the private key. While the private key is activated, the certificate holder must prevent unauthorized use of that private key.

(d) A certificate holder must not make back-up copies of the private key.

(e) The certificate holder must report the loss, theft, or compromise of the private key or the password, via a revocation request, to the Certification Authority within 24 hours of substantiation of the loss, theft, or compromise. Upon receipt and verification of a signed revocation request, the Certification Authority will revoke the certificate. The certificate holder must apply for a new certificate under the requirements of § 1311.25.