1. Marsha’s company has a token-based system with 64-bit base secrets stored inside each token, yielding 1.84 × 10 19 possible secrets. Everyone in the company (100 percent) has that kind of token. 2....

1. Marsha’s company has a token-based system with 64-bit base secrets stored inside each token, yielding 1.84 × 10 19 possible secrets. Everyone in the company (100 percent) has that kind of token.

2. Joe’s company has installed fingerprint sensors for logging in. The company is proud of the “proven” 99.9 percent accuracy of these machines. Everyone (100 percent) in the company uses them for logging in.