PGP Encrypted Keyword Data

PGP Encrypted Keyword Data

Ansys LS-DYNA release 971 onwards permits data encrypted with "Pretty Good Privacy" (PGP) to be embedded anywhere in an input deck using the sequence:

-----BEGIN PGP MESSAGE-----
[Any number of lines of encrypted data]
-----END PGP MESSAGE-----

Typically this used to encode *AIRBAG, *MAT and *DEFINE_CURVE data in order to protect the intellectual copyright inherent in the values used, but it can be used for any keyword in a completely arbitrary fashion.

PGP uses "public/private key" encryption, in which anyone with the public key can encrypt data, but only those in possession of private key can decrypt it. Ansys LS-DYNA has this private key, but PRIMER does not, which means that the information in the encrypted sections is completely opaque to PRIMER . Therefore blocks of encrypted data within an input deck are handled as follows: