The rijndael tag has no wiki summary.
6
votes
1answer
461 views
Difference between Rijndael 128 / 256 blocksize implementations? (and impact of block size in general)
Can anyone shed some light onto the advantages/disadvantages of using Rijndael with 256-bit block size, as opposed to the 128-bit (AES) implementation? (please note: I'm not referring to key-size ...
3
votes
3answers
863 views
How does the key schedule of Rijndael looks for keysizes other than 128 bit?
It said in Wikipedia that:
[....] Rijndael can be specified with block and key sizes in any multiple of 32 bits, with a minimum of 128 bits. The blocksize has a maximum of 256 bits, but the ...
3
votes
1answer
114 views
Why does Rijndael with a 256-bit block require the bottom two rows to be shifted one more space than usual?
From Wikipedia:
For a 256-bit block, the first row is unchanged and the shifting for the second, third and fourth row is 1 byte, 3 bytes and 4 bytes respectively.
Why the change? Is there any ...
2
votes
1answer
578 views
What is the difference between these AES encryption methods
I am using AES encryption (Rijindael) with Base-64 encoding in Obj-C and VB. I am currently using the following two projects to achieve this:
Obj-C: ...
2
votes
1answer
404 views
Advantage of AES(Rijndael) over Twofish and Serpent
I'm trying to figure out a suitable encryption technique and after reading a bit, I figured the current AES 128-bit encryption is suitable for what I'm trying to do. However, this is more due to the ...
2
votes
1answer
309 views
How were the AES key and block length subsets of Rijndael selected?
My intuition tells me it's a trade off between speed and security, but how did the standardisation process select these three seemingly arbitrary key lengths (namely, AES-128, AES-192, AES-256).
1
vote
1answer
184 views
Storage of Private Keys
I'm building a bitcoin web application that will require all users to be assigned a wallet for adding funds to their account. I plan on exposing the public key to the user (the bitcoin address). Users ...
0
votes
0answers
39 views
NIST Standard for Advanced Encryption Standard Algorithm [duplicate]
Possible Duplicate:
Advantage of AES(Rijndael) over Twofish and Serpent
What is the reason of NIST why Rijndael choose as the Advanced Encryption Standard
-1
votes
1answer
87 views
What is the complexity of the Square attack against the reduced 4-rounds 128-bit Rijndael variant?
I'm looking at a square attack against a reduced version of AES-128 with only 4 rounds (with block and key size of each 128 bit). I have a set of 256 plaintext-ciphertext block pairs.
What is the ...
-5
votes
1answer
45 views
AES ENCRYPTION ALGORITHM [closed]
What is the amount of decrease in the probability of decrypting a data encrypted using an AES algorithm? (That is by introducing each round out of ten whole rounds, how the probability of decryption ...
