Can't find DBMS_CRYPTO package in my 10g R1

Question

Hi, I want to use the DBMS_CRYPTO pakage, I found some plsql code to use it, but when compile my code, the databse told me that this pakage not exists, I try with SYS user, but alwas the same error. I can't find this package that assumes to be included in 10g.
Thanks

Answer 1

What is the output of this query?
SQL> select object_name, owner, object_type from dba_objects where object_name = 'DBMS_CRYPTO' ;
OBJECT_NAME                    OWNER                          OBJECT_TYPE
DBMS_CRYPTO                    SYS                            PACKAGE
DBMS_CRYPTO                    SYS                            PACKAGE BODY
DBMS_CRYPTO                    PUBLIC                         SYNONYM
SQL> disconnect
Disconnected from Oracle Database 10g Enterprise Edition Release 10.1.0.3.0 - Production
With the Partitioning, OLAP and Data Mining options
SQL>