How to read Oracle Datafile .dbf using stings command in Unix

Question

I am in the process of implementing TDE in Oracle Database. I am trying to read the datafile using STRINGS command in UNIX but instead of displaying values the command is showing as below

$ strings tbs1pdbtde.dbf
}|{z
DBDEMO
TBS1PDBTDE

Instead of the above it should be showing:

DATE
DATE
DATE
DATE
DATE
DATE

What environment variable I have to set to display the output of STRINGS command?