| The cryptographic problem is that the combining operation used to determine successive states in the sequence is linear and hence easily invertible, even though the sequence can be 2n − 1 bits in length before repeating. |
| The eye-peduncles are peculiar in being invertible in the same manner that a kid glove finger is pulled inside out. |
| The idea haunted him like the invertible companions of Orestes. |
| What follows is not a strict fugue, but a fugato in five-part invertible counterpoint. |
| But because cryptographic functions must be invertible, must be fast to compute, and should have small key size and memory requirements, linear functions are irresistible. |
| It was Gardner who first showed me the invertible signatures designed by Scott Kim. |
