| In the business operations the tape media is | | | | number called the "initialization vector". The element |
| transported physically form one location to the other. | | | | increases by one and on the other hand AES |
| So, the LTO-4 tape media has the security and | | | | algorithm operates the output. It is the requirement of |
| encryption features to make sure that the data is | | | | GCM that at the each record's end the initialization |
| transported safely and is protected form unauthorized | | | | vector should be created fresh again. The vector |
| usage. So, we conclude that the encrypted data is | | | | resets the internal counter for the record that is being |
| safer for transportation. Without the encryption, the | | | | read during the reading operation. Then afterwards the |
| organizations cannot secure the backup data. The | | | | message of authenticated encryption is generated by |
| other security measures like key and locks are not | | | | the "Galois field mathematics". Additional security is |
| that reliable as the encryption of the backup data that | | | | provided to the data record by the tag value. The tag |
| the LTO-4 tape provides. The reason for the | | | | value is called by the spec. In the same way the AAD |
| enhanced capacity of the tape is because of the | | | | (Additional Authenticated Data) generates. The AAD |
| increased length of the tape reel and the base films | | | | works as a hook and helps to retrieve the keys from |
| are also thin. The "head technology" of the LTO4 tape | | | | the "key management". The AES-GCM couples with |
| cartridge is also enhanced. The (PRML) Partial | | | | the system of "key management" and protects the |
| Response Maximum Likelihood encoding feature in the | | | | tapes that are in transit. So, the data decryption cannot |
| LTO4 tape increases the data density. In the | | | | be done in case the media is lost. What ever the |
| specification of the Linear Tape Open ultrium is | | | | standard is, the encrypted data is always reliable along |
| included the encryption of LTO 4. In the "formatting | | | | with the "key management". This is the best option for |
| chip" of the tape drive is implemented the algorithm of | | | | the protection of the data from theft or any other loss. |
| AES-GCM. The AES 256 in the LTo-4 is known as | | | | The "encryption management" is required for the |
| unbreakable, so the valuable data stored in the LTO4 | | | | complete system. Most of the vendors integrate the |
| is protected form theft or loss. The cost of encryption | | | | "encryption management" with in the tape libraries. |
| function in the LTO4 tape format is very low due to | | | | According to the research done by IDC, the tape |
| the implementation of the encryption AES 256 in the | | | | drives of LTO generated 883 million dollars in the year |
| "buffer management" of the LTO 4 drive. The tape | | | | 2007. And the IDC predicts that the revenue from the |
| cartridges can be interchanged among the tape | | | | LTO tape format will exceed 1.4 billion dollars by the |
| libraries and drives by the implementation of the "key | | | | year 2009. The powerful features of the fourth |
| management". In the Advanced Encryption Standard | | | | generation LTO4 tape format are the WORM |
| encryption algorithm, single key is used for the | | | | technology, encryption technology of AES-GCM, |
| encryption of the four byte by four byte array of data. | | | | reading and writing compatibility with the 3rd generation |
| Galois counter mode is the operation mode for the | | | | LTO3 tape and the reading compatibility with the 2nd |
| Advanced Encryption Standard (AES). The GCM | | | | generation LTO2 tapes. |
| seeds a counter, the counter is seeded with random | | | | |