Tuesday, June 14, 2011

AES 128

In the previous post, it is mentioned that ZigBee uses AES 128 encryption. I thought it is good to give brief information about it because security is one of most important issues for everyone.

AES refers to Advanced Encryption Standard which is a symmetric key encryption standard. This standard has three block ciphers which are AES 128, AES 192 and AES 259. All of them have 128-bit block size with key sizes of 128, 192 and 256 bits. ZigBee uses AES 128. When we look at the history of AES, it was announced by National Institute of Standards and Technology in 2001. After announcement, 5 years standardization process took place. At the end of this process, Rijndael was selected as most suitable one. in 2002, it has started to be effective because it was approved by the Secretary of Commerce.

I don't want to go into deep explanation of AES because it requires many other knowledge. I believe that explanations are enough to prove security of AES.

1 comment:

  1. My HD is split into two partitions. One of which is encrypted with an AES 128 bit cipher. If i were to get a virus on my non-encrypted partition would it be possible for it to spread to the encrypted one?
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