Structured file encryption process

A non-transitory data storage medium comprising machine readable instructions for one or more of a plurality of processors to:

• partition a structured data set into a first subset and a plurality of further subsets to define a first number of data subsets;
• divide the subsets into a plurality of blocks of predetermined size;
• identify a first block for each subset and a location of each further block in said subset relative to said first block of its subset;
• cryptographically transform the subsets using a key according to a cipher block chain process, the cryptographically transform comprising an encryption of the data set in parallel using a number of the processors corresponding to the first number of data subsets;
• store in a non-volatile memory an offset value for the first block of each subset from the first block of the first subset;
• partition the encrypted data set using a second number of data subsets, wherein the second number is different from the first number of data subsets;
• and
• decrypt the data set in parallel using a number of the processors corresponding to the second number of data subsets.

A system comprising a plurality of computer processors, the computer processors configured to perform a cryptographic transformation process in parallel across the plurality of computer processors, wherein cryptographic transformation process includes:

• partitioning the structured data set into a first subset and a plurality of further subsets to define a first number of data subsets;
• dividing the subsets into a plurality of blocks of predetermined size;
• identifying a first block for each subset and a location of each further block in said subset relative to said first block of its subset;
• cryptographically transforming the subsets using a key according to a cipher block chain process, the cryptographically transforming comprising encrypting the data set in parallel using a number of the computer processors corresponding to the first number of data subsets;
• logging an offset value for the first block of each subset from the first block of the first subset;
• subsequently partitioning the encrypted data set using a second number of data subsets, wherein the second number is different from the first number of data subsets;
• and
• decrypting the data set in parallel using a number of the computer processors corresponding to the second number of data subsets.