Data Redaction / Display Masking / 표시제한조치
Advanced Security Option에 추가
동적 Display Masking 기능
☞ 사용자, IP, application context 등을 기준으로 중요 데이타에 대한 Redaction을 적용하여 인가되지 않은 사용자가 해당데이타를 조회할 때 동적으로 변조된 데이타를 보여 줍니다.
☞ Application의 수정이나 구성 변경이 필요 없습니다.
☞ Oracle Database에서 사용된 데이타 타입은 모두 지원 됩니다.
☞ 최소 부하
Oracle ASO 데이타 마스킹 구현방법
1. Redaction 정책을 통한 실행과 중지
Customers 테이블의 중요 정보 (security_id, credit_card_id, birth_year)를 redaction 처리. 오직 customers 테이블의 소유자 (BMT)만 오리지널 데이터 확인DBMS_REDACTION 패키지를 이용하여
수행 Redaction 생성 및 실행을 위한 DBMS_REDACT(ADD, ALTER, DISABLE, DROP, ENABLE, UPDATE 포함) 패키지를
bmt유저에게 권한 할당을 해줍니다.
conn / as sysdba
alter user scott identified by tiger account unlock;
create user bmt identified by bmt;
grant connect, resource to bmt;
grant select on redaction_policies to bmt;
grant select on redaction_columns to bmt;
grant execute on dbms_redact to bmt;
conn bmt/bmt
create table customers (
customer_id number(10),
customer_name varchar2(20),
birth_year varchar2(2),
birth_month varchar2(2),
birth_day varchar2(2),
security_id varchar2(14),
card_company_id varchar2(4),
credit_card_id varchar2(20),
phone1 varchar2(15),
phone2 varchar2(15),
zip varchar2(10),
address01 varchar2(256),
address02 varchar2(256)
);
테스트 데이터 생성
conn /as sysdba
grant select on bmt.customers to scott;
2. Redaction Policy 생성
Customers 테이블의 중요 정보 (security_id, credit_card_id, birth_year)를 위한 redaction policy를 생성합니다.
conn bmt/bmt
–============================================================================
–Redaction 적용 1 => security_id *BMT
–=========================================================================================
BEGIN
DBMS_REDACT.ADD_POLICY(
object_schema => ‘bmt’,
object_name => ‘customers’,
column_name => ‘security_id’,
policy_name => ‘redact_cust_ssns2’,
function_type => DBMS_REDACT.PARTIAL,
function_parameters => ‘VVVVVVFVVVVVVV,VVVVVV-VVVVVVV,*,7,13’,
expression => ‘SYS_CONTEXT(”USERENV”,”SESSION_USER”) NOT LIKE ”BMT”’,
policy_description => ‘Partially redacts Security numbers’,
column_description => ‘ssn contains character Social Security numbers’);
END;
/
–=========================================================================================
–Redaction 적용 2 => CREDIT_CARD_ID *BMT
–=========================================================================================
BEGIN
DBMS_REDACT.ALTER_POLICY(
object_schema => ‘bmt’,
object_name => ‘customers’,
policy_name => ‘redact_cust_ssns2’,
action => dbms_redact.ADD_COLUMN,
column_name => ‘CREDIT_CARD_ID’,
function_type => DBMS_REDACT.PARTIAL,
function_parameters => ‘VVVVFVVVVFVVVVFVVVV,VVVV-VVVV-VVVV-VVVV,*,11,16’,
expression => ‘1=1’,
policy_description => ‘Partially redacts Card numbers’,
column_description => ‘card contains character Card numbers’);
END;
/
–=========================================================================================
–Redaction 적용 3 => BIRTH_YEAR *BMT
–=========================================================================================
BEGIN
DBMS_REDACT.ALTER_POLICY(
object_schema => ‘bmt’,
object_name => ‘customers’,
policy_name => ‘redact_cust_ssns2’,
action => dbms_redact.ADD_COLUMN,
column_name => ‘BIRTH_YEAR’,
function_type => DBMS_REDACT.RANDOM,
expression => ‘SYS_CONTEXT(”USERENV”,”SESSION_USER”) NOT LIKE ”BMT”’
);
END;
/
3. Redaction 적용 table 조회
실제로 테이블에 데이터가 redaction되어 조회되는지를 확인합니다.
BMT계정으로 조회
conn bmt/bmt
set line 200
col customer_id for 9999
col customer_name for a15
col credit_card_id for a20
col security_id for a15
col birth_year for 99
col birth_month for 99
col birth_day for 99
select customer_id, customer_name, birth_year, birth_month, birth_day, credit_card_id, security_id from customers where customer_id<10 ;
SCOTT 계정으로 조회
conn scott/tiger
set line 200
col customer_id for 9999
col customer_name for a15
col credit_card_id for a20
col security_id for a15
col birth_year for 99
col birth_month for 99
col birth_day for 99
select customer_id, customer_name, birth_year, birth_month, birth_day, credit_card_id, security_id from bmt.customers where customer_id < 10 ;
4. Redaction Policy Disable/Enable/Drop
다음과 같이, 생성된 Redaction policy를 Disable/Enable/Drop 할 수 있습니다.
conn bmt/bmt
BEGIN
DBMS_REDACT.DISABLE_POLICY (
object_schema => ‘bmt’,
object_name => ‘customers’,
policy_name => ‘redact_cust_ssns2’);
END;
/
conn bmt/bmt
BEGIN
DBMS_REDACT.ENABLE_POLICY (
object_schema => ‘bmt’,
object_name => ‘customers’,
policy_name => ‘redact_cust_ssns2’);
END;
/
conn bmt/bmt
BEGIN
DBMS_REDACT.drop_policy(object_schema => ‘BMT’
,object_name => ‘CUSTOMERS’
,policy_name => ‘redact_cust_ssns2’
);
END;
/
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