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MapReduce >> mail # user >> Re: Encryption in HDFS


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Re: Encryption in HDFS
Most recent crypto libraries use the special instructions on Intel
processors.

See for instance:
http://software.intel.com/en-us/articles/intel-advanced-encryption-standard-aes-instructions-set
On Mon, Feb 25, 2013 at 9:10 PM, Seonyeong Bak <[EMAIL PROTECTED]> wrote:

> Hello, I'm a university student.
>
> I implemented AES and Triple DES with CompressionCodec in java
> cryptography architecture (JCA)
> The encryption is performed by a client node using Hadoop API.
> Map tasks read blocks from HDFS and these blocks are decrypted by each map
> tasks.
> I tested my implementation with generic HDFS.
> My cluster consists of 3 nodes (1 master node, 3 worker nodes) and each
> machines have quad core processor (i7-2600) and 4GB memory.
> A test input is 1TB text file which consists of 32 multiple text files (1
> text file is 32GB)
>
> I expected that the encryption takes much more time than generic HDFS.
> The performance does not differ significantly.
> The decryption step takes about 5-7% more than generic HDFS.
> The encryption step takes about 20-30% more than generic HDFS because it
> is implemented by single thread and executed by 1 client node.
> So the encryption can get more performance.
>
> May there be any error in my test?
>
> I know there are several implementation for encryting files in HDFS.
> Are these implementations enough to secure HDFS?
>
> best regards,
>
> seonpark
>
> * Sorry for my bad english
>
>