The bit of code she had received in return, which her Malaysian friend had called "Stethoscope," was not the most broadly employable piece of gear she'd ever owned, but it had its uses. What it did best was to locate extremely small changes in processing speed—things that would never show up at the interface level of the system, but which could be used to discover potential bugs before they became larger problems. Not being in the gear-creation business, Dulcie had never used it for its intended purpose, but she had occasionally found it useful for locating flaws in the security of systems she wished to attack. She hadn't used it for almost a year before the Australia trip but it had proved very handy during Dread's incursion into the Grail system. Now something—hacker's intuition, perhaps—suggested it might serve a purpose again.
Because there has to be something else going on, Dulcie told herself as she put Stethoscope to work.
She started up the random-character generator again so the gear would have something to analyze, then sat back to sip her tea. She had almost forgotten the bolt of fear that had shot through her when Dread had burst shouting onto her screen. Almost.
Three minutes later the character-generation cycle had finished, as unsuccessfully as it had the other two dozen times. She opened the Stethoscope report and felt her heart quicken. There was something, or it certainly looked that way: a small hesitation, a minute hitch, as though Dread's system security had paused for a moment. Which, she guessed, meant that the security program had seen part of what it wanted, done a check, not found whatever else it needed to open access, and rebuffed the overture.
Dulcie bit her lip, thinking. It had to be some kind of double password—first X, then Y. But if the generator had given a prompt for the second password? Why hadn't the system stopped and waited? No human being could input fast enough to cough up another password in that microsecond of hesitation, even if it was spoken instead of typed.
Spoken. The back of her neck prickled. She checked Dread's system and felt a glow of triumph when she discovered, as she had guessed, that the audio input was turned off. That was it. The second password was supposed to be spoken after the first had been typed. The system had heard the first, checked for audio and found it disabled, so it had treated the whole thing as a failed attempt, all of this happening in a flash of time too small to be perceived by human senses.
She turned the audio on, reminding herself to be damn sure to turn it off again when she was finished—otherwise she might as well leave Dread a note saying she had been trying to hack his system—and began to patch together some modifications, hooking the character generator to the Stethoscope gear. When the hesitation came this time, the character generator would stop to be read, which should at least give her the first password.
She took another sip of tea, barely tasting it, then set the generator to work—in her mind's eye it was a roulette wheel, spinning so fast as to be almost invisible. In less than a minute it stopped, the letters "DREAMTIME" blinking in the log-in box. She recognized the word from her brief survey of Aboriginal mythology and felt a flush of triumph. This time, with the audio enabled, the system had recognized the first password and was waiting for the second.
But it's not going to wait very long, she suddenly realized, and the glow of victory faded. It's going to give me ten seconds, or twenty at the most, then it's going to shut off unless I say the right word. And the next time, or the time after that, when I don't give the right password, it's going to shut down for good—cut off all access, maybe even set off an alarm. It will certainly leave a damn clear mark that someone tried to get in.
She could never come up with the second password off the cuff, could think of nothing to try except "Wulgaru," which still seemed too obvious. And she could not generate could generate characters directly to the system, not even if she modified the character generator—which would take days anyway, maybe weeks of work in an area she knew almost nothing about.
Ten seconds gone. "DREAMTIME" still blinked on her screen, mocking her, but any moment now the window would close. She had worked so hard to solve the first part of the puzzle, but even though she had done it, she was stuck, fooled, foiled.
"Son of a bitch!" she said feelingly.
At the last word, the screen went blank. A moment later, "ACCESS GRANTED" flashed up and the door of Dread's hidden room opened.
The fifty-six files were ordered by date, the first over five years old and simply labeled "Nuba 1." She opened it and discovered it was sight-and-sound, but only 2D, not full wraparound. In many ways the quality was even worse than the lab experiment files. The whole thing had been shot by a single very primitive camera fixed in one place, like surveillance footage.
At first it was hard to make sense of it. The picture was extremely dark. She only realized after watching for half a minute that the concrete pillars in the foreground were some kind of outdoor structure, the support for a freeway ramp, perhaps, and the dark background near the top was actually night sky.
Movement near the base of one of the pillars, hidden in shadow despite a pool of light from what she guessed was a sodium lamp on the freeway above, proved eventually to be two human figures, although the human part was only an educated guess until at least a minute of the footage had passed. At first she thought the dark, indistinct shapes against one of the farther pillars were making love—first a hand, then a leg extended out into the light splashing down beside them. Then, with an indrawn breath of horror, she became sure that the larger one was strangling the former. But even that seemed not to be true, since after a moment the larger figure stood and the smaller was revealed to be still moving, slumped against the pillar but holding out its hands as though imploring the large one not to leave. The only sound in the file was the continuos rumble of traffic, muted and low, as though the camera were closer to the roadway than the events being viewed.
It was hard to see what happened next and harder still to understand why anyone should bother to make a record like this of it. The quality of the image was maddening, as though someone had found a way to reroute the footage from a security camera with a bad correction chip. Why? What did it all mean?
The larger figure leaned over the smaller, exhibiting something that shimmered palely for just a moment, catching a glint of the overhead light—a bottle? A knife? A folded piece of paper? The small figure seemed to be arguing or pleading, with much movement of hands, but Dulcie's bad feelings about the whole thing were eased a bit by the fact that the smaller one made no attempt to escape.
The larger shape knelt beside the smaller, holding it so close that again they appeared to be making love, or at least preparing to do so. For a long time—it was two minutes' worth of file but it seemed even longer—the two shadowy shapes were merged. Every now and then a hand would emerge again, waving slowly as though to the distant camera or to a departing train. Once the hand emerged, stretching to what must have been its greatest reach. The spread fingers slowly closed, like a flower shutting for the night, a movement almost beautiful in its simplicity.
At last after many minutes the larger figure rose. The smaller still sat against the pillar, but before Dulcie could see anything more the footage ended.