Encrypted content data structure package and generation thereof

A data tree structure stored on one or more computer-readable media, the data tree structure being usable to extract one or more database keys from a compressed key and the data structure being produced by act of a computer implemented method comprising:

• generating a first field containing a root node that contains a compressed key value;
• generating a second field containing a plurality of subordinate nodes that each contain the compressed key value raised, modulo an integer modulus, to the power of an extraction power;
• generating a third field functioning to delimit the end of the data tree structure;
• wherein the node values are used to extract one or more database keys from the compressed key value.