Encryption and decryption service method and system based on identity management

The invention discloses an encryption and decryption service method and system based on identity management. The encryption and decryption service method comprises the following steps: a client sends basic information of a user to an identity verification server; the identity authentication server performs identity authentication on the user according to the password and the user name, generates a first secret key pair after the authentication is passed, and distributes and sends the first secret key pair to the client and the identity management server; the client generates a service request, and encrypts the service request through the first public key; the identity management server decrypts the service request by using the first private key, generates a second key pair after decryption, and sends a second public key to the client; the client encrypts the original data of the user according to the second public key; and the identity management server decrypts the encrypted original data by using the second