"key lengths" . "88 bits" . "80-bit key" . . "128-bit key" . "128-bit encryption" . "Key size" . "encryption" . "key size" . "encrypted" . "160 bit key" . "fairly weak" . "size" . "sizes" . . . . "resist" . "Key strength" . "48-bit" . "length and strength" . "Key length" . "Key_size" . "length" . "key" . "Key size" . "80-bit" . .