Block ciphers must be used in ciphertext stealing or residual block termination mode to avoid padding , while stream ciphers eliminate this issue by naturally operating on the smallest unit that can be transmitted -LRB- usually bytes -RRB- .

Block ciphers must be used in ciphertext stealing or residual block termination mode to avoid padding , while stream ciphers eliminate this issue by operating on the smallest transmitted unit -LRB- usually bytes -RRB- .
