original: a large proportion of block ciphers use the scheme , including the data encryption standard -lrb- des -rrb- .
simplifications: most block ciphers use data encryption standard , also known as des . many block ciphers use this system , including the data encryption standard -lrb- des -rrb- . a large proportion of the block ciphers use this scheme , including the data encryption standard -lrb- des -rrb- . a large proportion of the block ciphers use the scheme -lrb- including the data encryption standard - des -rrb- . a large proportion of block ciphers use the scheme . a large proportion of block ciphers use the scheme , including the data encryption standard -lrb- des -rrb- . a large quantity of block ciphers use the scheme , including the data encryption standard -lrb- des -rrb- . a large amount of block ciphers use the scheme , including the data encryption standard -lrb- des -rrb- .