Taking the block cipher AES as an example, the criterion nonlinearity of S-box was introduced to quantify its resistance related to linear cryptanalysis; while the differential uniformity was used ...

However, the report said Adobe had used a single block cipher throughout the database, resulting in identical passwords having the same ciphertext in the database.

Most encryption algorithms use the block cipher method, which codes fixed blocks of input. Others use the stream method, which encrypts one bit at a time.

A block diagram of the AES engine is shown in figure 2. Fig. 2: The Xtensa processor extended with AES cipher functionality. Figure 2 shows an Xtensa processor block diagram, configured and extended ...