Computer technology for combining an encryption/decryption (e/d) key with additional information to obtain a specialized e/d key. The additional information one or more of the following types of additional information: client UUID (universally unique identifier), FQDN (fully qualified domain name), database hardware information, data physical position on the hard disk and/or stored data creation date. By combining the basic key with these kind(s) of operational information and/or software/hardware identifier information, the security of the underlying encrypted data can be meaningfully enhanced.