For each pair (i, j), with j [not equal to] i and j [not equal to] 2, the attacker performs another oracle decryption to obtain [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII].
By performing a trial decryption of all blocks with [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII], the attacker can learn, [s.
If the attacker has compromised more nodes, he can perform trial decryption with the destination key of every compromised node to detect whether they lie on the path.
When using the decryption oracles, no investigation will be started.
After picking out the destination and performing partial decryption, the onion has the following form:
2] as a decryption oracle to obtain a copy of an onion that would have been sent by [s.
Both encryption and decryption are at least twice as fast as any other finalist.
The speed is second best among the finalists, although only about half as fast as the Rijndael decryption speed.
Rijndael emerges as the best, with a low RAM requirement and at least twice the encryption and decryption speed of any other finalist.
Cipher Block Chaining, Cipher Feedback, and Output Feedback), the encryption or decryption of the next block cannot begin until the present block has finished.
If an algorithm has homogeneous rounds, the simplest implementation of encryption or decryption in hardware is to implement one round in combinational logic.
Another possibility is to perform subkey computation in hardware prior to encryption or decryption, and store the subkeys in registers or RAM.