Using ciphertext to deduplicate data using wide-block encryption

The computer-implemented method of claim 3, comprising:

• receiving a stream of data at the data storage server;
• determining whether the stream of data includes data instances that are configured to implement data reduction accommodating persistent encryption;
• and
• in response to determining that the stream of data includes a subset of data instances that are configured to implement data reduction accommodating persistent encryption, compressing a first of the subset of data instances to create the compressed instance of data.

A computer-implemented method, comprising:

• compressing an uncompressed instance of data to create a compressed instance of data;
• in response to determining that a size of the compressed instance of data is outside a predetermined range, encrypting the uncompressed instance of the data utilizing wide-block encryption to create a ciphertext string;
• and
• using a predetermined subset of the encrypted uncompressed instance of data in the ciphertext string to perform deduplication at a data storage server,
• wherein the deduplication is performed at the data storage server without calculating a hash value at the data storage server.

A computer program product, comprising a computer readable storage medium having program instructions embodied therewith, the program instructions readable by a processor, executable by the processor, or readable and executable by the processor, to cause the processor to:

• compress an uncompressed instance of data to create a compressed instance of data;
• in response to determining that a size of the compressed instance of data is outside a predetermined range, encrypt the uncompressed instance of the data utilizing wide-block encryption to create a ciphertext string;
• and
• use a predetermined subset of the encrypted uncompressed instance of data in the ciphertext string to perform deduplication at a data storage server,
• wherein the deduplication is performed at the data storage server without calculating a hash value at the data storage server.

A system, comprising:

• a data storage server;
• and
• logic integrated with the data storage server, executable by the data storage server, or integrated with and executable by the data storage server, the logic being configured to:
• compress an uncompressed instance of data to create a compressed instance of data;
• in response to determining that a size of the compressed instance of data is outside a predetermined range, encrypt the uncompressed instance of the data utilizing wide-block encryption to create a ciphertext string;
• and
• use a predetermined subset of the encrypted uncompressed instance of data in the ciphertext string to perform deduplication at a data storage server,
• wherein the deduplication is performed at the data storage server without calculating a hash value at the data storage server.