select
  algorithm_id,                            -- ALGORITHM_ID NUMBER
  algorithm_name,                          -- ALGORITHM_NAME VARCHAR2(64)
  algorithm_description,                   -- ALGORITHM_DESCRIPTION VARCHAR2(64)
  is_default,                              -- IS_DEFAULT VARCHAR2(3)
  restore_only                             -- RESTORE_ONLY VARCHAR2(3)
from
  gv$rman_encryption_algorithms
where
  inst_id = USERENV('Instance')