A substitution resource can be given in an encrypted format. Encrypted data can be directly represented in the string of format as "+=enc:ext::XXXX:" in which the part of XXXX contains the encrypted data. This format of data is created with "-Fenc" option of DeleGate. When it is named with the suffix ".cdh" as "+=conf.cdh", it is decrypted by "Credhy" using the passphrase for decryption which is specified as the password of the "config" user.