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Or perhaps they just took my fingerprints from Luna City, he thought. He had been too distraught to think about the mug of tea he’d drunk. Fred could have arranged for it to be picked up and then delivered to one of his associates. Now, let’s see

The files on the datapad unlocked, one by one. Three of them were text files, the fourth was an executable program. He opened the first text file and read it, quickly. It consisted of nothing more than instructions, which he had apparently twenty-four hours to follow or else. They didn’t go into details, but it didn’t matter. He knew what ‘or else’ meant.

He sighed. He’d have to take the terminal to the Marines and hope they knew what to do with it. And that the blackmailers didn’t notice what he’d done.

* * *

“They want what?” Ted asked.

“Access codes,” Major Parnell said. His technicians had been examining the datachip since the CAG had brought it to them. “They want his access codes, but also access codes belonging to the XO and the Captain. And they want him to upload the program on the datachip into the main computer.”

Ted shook his head, firmly. Ark Royal was less dependent on automation than the modern carriers, but they didn’t dare risk losing the main computer. It was bad enough that the system was a patchwork of ancient Royal Navy gear merged with Russian, Chinese and French systems. He’d had nightmares about it coming apart at the seams ever since the aliens had proven their ability to shoot through the hull. They’d built as much redundancy into the system as they could, but he knew it wouldn’t be enough.

Fitzwilliam had another question. “What does the program actually do?”

“It’s a virus,” Parnell said. “It won’t do anything until it receives the signal. When it does, it will hack its way into the ship’s datanet and take control, locking us all out. Or it would, according to the techs, if we were a normal ship. The virus wasn’t designed with our systems in mind.”

Ted’s eyes narrowed. “Are you sure of that?”

“The techs think our systems won’t be able to support the virus when it goes active,” Parnell said. “But I’d prefer not to test it.”

“Me neither,” Ted said. He shared a glance with Fitzwilliam. “What about the original message, the one alerting Schneider to pick up the chip?”

“Apparently, it was sent from one of the terminals on the lower decks,” Parnell said. “The system was accessed using a standard dockyard access code, not a crewman’s personal login. It could be any of the dockyard workers who sent the message.”

“Or someone pinched their code and used it,” Ted said. Normally, dockyard codes were purged from the system as soon as the ship left the shipyard. This time, with dockyard workers still onboard, the codes had been left in place. “They all use the same one, don’t they?”

Parnell nodded.

“We’re looking through footage now, sir,” he said. “But we may be unable to locate the person responsible. Too many people pass through the lower decks.”

“Of course they do,” Fitzwilliam agreed. “Haven’t you been urging the ambassadors and their staffs to take some exercise?”

Ted tapped the desk, shortly. “What could they do with personal access codes,” he mused. “And how could they expect Schneider to obtain them?”

“Someone with enough experience at manipulating a computer could probably pull someone else’s access code out of the system,” Parnell said. “It’s a persistent headache on the ground, sir. Terrorists and insurgents often try to fight smarter, as well as harder, and there’s always some idiot who leaves their access codes unsecured. Once they’re in the system, they can create dummy login details for themselves and slip in and out at will.”

He shook his head. “And anyone onboard ship will be already inside the outermost firewall,” he added. “The system won’t see anything Schneider does as an attempt to force access from outside the hull.”

Ted nodded. One of the Admiralty’s persistent nightmares, ever since computers had become utterly indispensible to operating starships, was someone hacking into the Royal Navy’s datanet and crashing the entire system, leaving the fleet helpless. The fear was so prevalent that hundreds of precautions had been taken, from isolating each starship to hardwiring certain safeguards into their computer networks. But, during wartime, isolating starships from the datanets prevented them from working together smoothly. No one, it seemed, had seriously considered all-out war with an alien race.

But they might be able to break into our systems, he thought, morbidly. We broke into theirs and they have a head start.

“Right,” he said. “We can’t take the risk of uploading the program.”

“It might be workable,” Parnell said. “We could disable it first…”

“Too risky,” Fitzwilliam said.

Ted nodded in agreement.

“Captain, Admiral, we don’t know who left the chip in the observation blister,” Parnell said. “And Schneider has been ordered to forward the access details to a specific location within our system, not return to the blister. It’s within the entertainment subsection…”

“Where everyone and his aunt goes when they’re not on duty,” Ted groaned. Ark Royal carried millions upon millions of movie files, music tracks and VR simulations to entertain her crew when they had some downtime. That part of the network was hard to patrol, let alone to secure. If the files were isolated in a specific location, it was unlikely they’d be discovered by the wrong person. “Can’t we track down the user?”

“We can flag the file so we’re beeped if it’s accessed,” Parnell said. “The only question is what we actually give them?”

Fitzwilliam eyed him, suspiciously. “What would you like to give them?”

“Access codes that can be cancelled, if necessary,” Parnell said. “Look, they don’t seem to be familiar with our computer systems. Their virus might have failed even if Schneider uploaded it for them. We give them a set of access codes that look modern, but have to be approved and authorised by us before they do anything. At the very least, we’d be able to track down whoever was using them.”

“True,” Ted said. “But why do they want the codes?”

“Sabotage,” Parnell guessed. “Other than that, I can’t imagine what they might have in mind. Unless they are working for the aliens, of course.”

Ted gritted his teeth. “If the aliens could talk to us well enough to tell spies what to do,” he said, “why couldn’t they talk peace without…”

He waved a hand at the bulkhead. “Surely, they must realise the war hasn’t gone as well as might be expected.”

“Insufficient data,” Parnell said.

“There is another possibility,” Fitzwilliam said, suddenly. “One of the Ambassadors is planning something.”

Ted gave him a sharp look. “They know just how bad things are,” he said. “They wouldn’t try to rock the boat, would they?”

“My family does a little diplomatic work,” Fitzwilliam said. It wasn’t common for him to talk about his family, not since his failed attempt to take command of Ark Royal. “A great deal of diplomacy, particularly between the major powers, consists of maintaining the status quo rather than one nation attempting to best another nation. That’s why we ended up with agreements not to build large numbers of mass drivers and not to fight each other in the Solar System.