System and method for providing data security in a hosted service system

1. A method for protecting sensitive data in a hosted service system, wherein the hosted service system includes a host system adapted to receive data from a tenant system, the tenant system being communicatively coupled to the host system via a communication network, and wherein the sensitive data is some of the data of the tenant system, the method comprising:

receiving a database query result (DB query result) from a database, wherein the host system includes the database;

determining if a part of the DB query result is associated with the sensitive data, wherein the determination is performed by a metadata service system (MSS), and wherein the MSS is adapted to maintain metadata of the sensitive data, wherein the metadata includes encryption information;

if the part of the DB query result is associated with the sensitive data:

receiving, from a key management system (KMS), at least one encryption key corresponding to the part of the DB query result, wherein the KMS is adapted to function as a repository of encryption keys, the encryption keys being used to encrypt the sensitive data;

encrypting the part of the DB query result using the at least one encryption key corresponding to the part of the DB query result; and

generating a modified DB query result, wherein the modified query result includes the encrypted part of the DB query result;

generating a query result using at least one of the DB query result or the modified DB query result;

transmitting the query result;

generating a host response;

determining if a part of the host response is associated with the sensitive data, wherein the determination is performed by the MSS;

if the part of the host response is associated with the sensitive data:

receiving, from the KMS, at least one encryption key corresponding to the part of the host response;

decrypting the part of the host response using the at least one encryption key corresponding to the part of the host response; and

generating a modified host response, wherein the modified host response includes the decrypted part of the host response;

generating a client response by manipulating at least one of the host response or the modified host response, wherein the manipulation is performed using a data exchange format; and

transmitting the client response.

2. The method of claim 1 , further comprising:

authenticating a user of a client associated with the tenant system, and wherein the authentication is performed by a user registry and access control management element (UR-ACM), and wherein the host system includes the UR-ACM;

routing a client request from the client to the database;

generating the host response using the query result, wherein generating is performed by a processing application, wherein the processing application is communicatively coupled to the MSS, the KMS and the UR-ACM, and wherein the host system includes the processing application; and

routing the host response.

3. A method for protecting sensitive data in a hosted service system, wherein the hosted service system includes a host system adapted to receive data from a tenant system, the tenant system being communicatively coupled to the host system via a communication network, and wherein the sensitive data is some of the data of the tenant system, the method comprising:

receiving a client request from a client associated with the tenant system;

determining if a part of the client request is associated with the sensitive data, wherein the determination is performed by a metadata service system (MSS), and wherein the MSS is adapted to maintain metadata of the sensitive data, wherein the metadata includes encryption information;

if the part of the client request is associated with the sensitive data:

receiving, from a key management system (KMS), at least one encryption key corresponding to the part of the client request, wherein the KMS is adapted to function as a repository of encryption keys, the encryption keys being used to encrypt the sensitive data;

encrypting the part of the client request using the at least one encryption key corresponding to the part of the client request; and

generating a modified client request, wherein the modified client request includes the encrypted part of the client request;

generating a tenant request by manipulating at least one of the client request or the modified client request, wherein the manipulation is performed using a data exchange format;

transmitting the tenant request;

routing the tenant request as a query;

receiving the query, wherein the receiving is performed by a query pre-parser, and wherein the host system includes the query pre-parser;

determining if the query received by the query pre-parser has a part of the query associated with the sensitive data, wherein the determination is performed by the MSS;

if the part of the query is associated with the sensitive data:

receiving, from the KMS, at least one encryption key corresponding to the part of the query;

decrypting the part of the query using the at least one encryption key corresponding to the part of the query; and

generating a modified query, wherein the modified query includes the decrypted part of the query;

generating a database query (DB query) using at least one of the query or the modified query; and

transmitting the DB query to the database.

4. The method of claim 3 , further comprising:

authenticating a user of the client, wherein the tenant system includes the client, and wherein the authentication is performed by a user registry and access control management element (UR-ACM), and wherein the host system includes the UR-ACM.