Data transfer device
AssigneeHewlett-Packard Development Company, L.P.
InventorJonathan Peter Buckingham
Life of this patent
Estimating the term…
Abstract
A data transfer device for storing data to a removable data storage item, wherein data are received as records and encrypted by the data transfer device prior to storage. The data transfer device encrypts a first portion of the records using a first encryption key and a second portion of the records using a second encryption key. The encrypted records are then stored to the removable data storage item as a plurality of data blocks, each data block comprising one or more encrypted records, wherein records in a respective data block are encrypted using only a respective one of the encryption keys.
Claims10
A tape drive for storing data to a tape cartridge, the tape drive being operable to:
- receive, from a host in communication with the tape drive, data to be stored as a plurality of records, each record having an indeterminate size;
- encrypt at the tape drive a first portion of the records using a first encryption key and encrypt at the tape drive a second portion of the records using a second encryption key, each of the first portion and the second portion comprising an integral number of records;
- store the encrypted records to the tape cartridge as a plurality of data blocks, each data block having a predetermined size and comprising one or more encrypted records, wherein records in a respective data block are encrypted using only a respective one of the first and second encryption keys;
- receive, from the host, the second encryption key;
- in response to receiving the second encryption key, pad a current partial chunk of data of the first portion so the partial chunk of data has a predetermined size and so each of the records is encrypted with a single encryption key;
- replace the first encryption key with the second encryption key;
- encrypt records to the tape cartridge with the second encryption key.
A tape drive for storing data to a tape cartridge, the tape drive comprising:
- means for receiving from a host data to be stored as a plurality of records, each record having an indeterminate size;
- means for encrypting at the tape drive a first portion of the records using a first encryption key and for encrypting at the tape drive a second portion of the records using a second encryption key, each of the first portion and the second portion comprising an integral number of records;
- means for storing the encrypted records to the tape cartridge as a plurality of data blocks, each data block having a predetermined size and comprising one or more encrypted records;
- means for receiving, from the host, the second encryption key;
- in response to receiving the second encryption key, means for padding a current partial chunk of data of the first portion so the partial chunk of data has a predetermined size and so each of the records is encrypted with a single encryption key;
- means for replacing the first encryption key with the second encryption key;
- means for encrypting records to the tape cartridge with the second encryption key.
A method of storing data to a removable tape cartridge, the method comprising:
- receiving, at a tape drive from a host, data to be stored as a plurality of records, each record having an indeterminate size;
- encrypting at the tape drive a first portion of the records using a first encryption key and encrypting at the tape drive a second portion of the records using a second encryption key, each of the first portion and the second portion comprising an integral number of records;
- storing the encrypted records to the tape cartridge as a plurality of data blocks, each data block having a predetermined size and comprising one or more encrypted records, wherein records in a respective data block are encrypted using only a respective one of the first and second encryption keys;
- receiving, from the host, the second encryption key;
- in response to receiving the second encryption key, padding a current partial chunk of data of the first portion so the partial chunk of data has a predetermined size and so each of the records is encrypted with a single encryption key;
- replace the first encryption key with the second encryption key;
- and
- encrypt records to the tape cartridge with the second encryption key.
Dependencies are inferred from the claim text.