Cryptonomicon

Lawrence tells Alan about the abaci. Even through the noise and the buzz, he can tell that Alan is thunderstruck. There is a pause while the technicians at each end flip over their phonograph records. When the connection is reestablished, Alan's still very excited. "Let me tell you something more," Lawrence says.

"Yes, go ahead."

"You know that the Nipponese use a plethora of different codes, and we still have only broken some of them."

"Yes."

"There is an unbroken cipher system that Central Bureau calls Arethusa. It's incredibly rare. Only thirty-some Arethusa messages have ever been intercepted."

"Some company code?" Alan asks. This is a good guess; each major Nipponese corporation had its own code system before the war, and much effort has gone into stealing code books for, and otherwise breaking, the Mitsubishi code, to name one example.

"We can't figure out the sources and destinations of Arethusa messages," Lawrence continues, "because they use a unique site code system. We can only guess at their origins by using huffduff. And huffduff tells us that most of the Arethusa messages have originated from submarines. Possibly just a single submarine, plying the route between Europe and Southeast Asia. We have also seen them from Sweden, from London, Buenos Aires, and Manila."

"Buenos Aires? Sweden?"

"Yes. And so, Alan, I took an interest in Arethusa."

"Well, I don't blame you!"

"The message format matches that of Azure/Pufferfish."

"Rudy's system?"

"Yes."

"Nice work on that, by the way."

"Thank you, Alan. As you must have heard by now, it is based on zeta functions. Which you did not even consider using for Delilah because you were afraid Rudy would think of it. And this raises the question of whether Rudy intended us to break Azure/Pufferfish all along."

"Yes, it does. But why would he want us to?"

"I have no idea. The old Azure/Puffeffish messages may contain some clues. I am having my Digital Computer generate retroactive one-time pads so that I can decrypt those messages and read them."

"Well, then, I shall have Colossus do the same. It is busy just now," Alan says, "working on Fish decrypts. But I don't think Hitler has much longer to go. When he is finished, I can probably get down to Bletchley and decrypt those messages."

"I'm also working on Arethusa," Lawrence says. "I'm guessing it all has something to do with gold."

"Why do you say that?" Alan says. But at this point the tone arm of the phonograph reaches the end of its spiral groove and lifts off the record. Time's up. Bell Labs, and the might of the Allied governments, did not install the Project X network so that mathematicians could indulge in endless chitchat about obscure functions.

Chapter 94 LANDFALL

The sailing ship Gertrude wheezes into the cove shortly after sunrise, and Bischoff cannot help but laugh. Barnacles have grown so thick around her hull that the hull itself (he supposes) could be removed entirely, and the shell of barnacles could be outfitted with a mast and canvas, and sailed to Tahiti. A hundred-yard-long skein of seaweed, rooted in those barnacles, trails behind her, making a long greasy disturbance in her wake. Her mast has evidently been snapped off at least once. It has been replaced by a rude jury-rigged thing, a tree trunk that has received some attention from a drawknife but still has bark adhering to it in places, and long dribbles of golden sap like wax trails on a candle, themselves streaked with sea salt. Her sails are nearly black with dirt and mildew, and rudely patched, here and there, with fat black stitches, like the flesh of Frankenstein's monster.

The men on board are scarcely in better shape. They do not even bother to drop anchor--they just run Gertrude aground on a coral head at the entrance to the cove, and call it a day. Most of Bischoffs crew has gathered on the top of V-Million, the rocket-submarine; they think it's the most hilarious thing they've ever seen. But when the men on Gertrude climb into a dinghy and begin rowing towards them, Bischoff's men remember their manners, and stand at attention, and salute.