Specifies if new algorithms or only algorithms compatible with PGP 2.6.x are used.
Use this property for compatibility with old versions of PGP-compatible software.
If this property is set to True, then newer and stronger algorithms will be used. In this case ClearTextSign and Sign will be compatible with PGP 2.6.x, while Encrypt and EncryptAndSign will not.
If the property is set to False, then the result will be compatible with PGP 2.6.x, while the keys are compatible (i.e. don't use features not supported by PGP 2.6.x).
Default value is True.