Digital security processing method based on private key escrow, equipment and storage medium

The invention discloses a digital security processing method based on private key escrow, equipment and a storage medium. The digital security processing method based on the private key escrow of an embodiment comprises the following steps: receiving a signature request sent by a client, and returning a signature response to the client, wherein the signature response carries fifth and sixth key generation parameters; receiving a third ciphertext acquisition request sent by the client, wherein the third ciphertext acquisition request carries a sixth client key generated according to the sixth key generation parameter and the user identification code; returning a third ciphertext acquisition response to the client, wherein the third ciphertext acquisition response carries a third ciphertextextracted from the encrypted result of the stored fifth private key ciphertext; receiving a third ciphertext decryption response returned by the client, wherein the third ciphertext decryption response carries a third decrypt