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astxlphe · 4 years

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Day 6 : Date Night // Daaku

Dazai takes Akutagawa out to the museum.

@bsd-rarepair-valentines-week

(Me, shoving my headcanons in your face: Aku is an art lover and I’ll die on that hill)

(Also the few art facts are probably a bit skewed, so don’t hesitate to correct me.)

“You’re here early."

It was just midnight, and Akutagawa sat on the steps in front of the museum, letting his coat cloak him in the dark. Of course, it didn’t hide him from Dazai. He was expecting him.

“You didn’t wait too long, did you?”

“No.” He had arrived almost a hour in advance. He stood, and Dazai approached, a spring in his steps.

“Good!”

“What are we doing here?”

A mischievous smile. “Can’t you guess?”

Akutagawa frowned, thinking. He still didn’t know why Dazai had called him here, in the middle of the night. He had at first assumed it was for a mission, but Nakajima Atsushi shone in his absence, so it couldn’t be what Dazai intended to happen.

He didn’t know what else the man could possibly want with him.

His silence seemed to be enough of an answer, because Dazai grinned and turned towards the museum behind them. “Simply put, Akutagawa-kun,” he declared, “I’m taking you to the museum.”

Akutagawa stilled. “Excuse me?”

“Why else would I ask you to meet me here?”

“You want to…” He paused, bewildered. “…to take me to the museum?” Dazai hummed approvingly. “Why?”

“Why not? You like museums, don’t you?”

He did, yes. But he had never told Dazai that, and he doubted the man ever noticed. “How do you know?”

“I asked around.” He motioned to the museum with his hand, and went on, stopping Akutagawa from commenting on the vague answer. “Are you coming?”

“Dazai-san, it’s midnight. Its closed.”

“I know!” He pushed the front door, and it opened with barely a sound. “That’s what makes it fun, isn’t it?”

Narrowing his eyes, Akutagawa followed. “I didn’t think detectives were allowed breaking and entering.”

“Is it really breaking and entering if the door isn’t locked?” The door closed behind them, and they were left in the dark.

Akutagawa had been to the Yokohama Museum of Arts before. He’s walked through those corridors many times in the past few years, ever since Kouyou brought Gin and him here for the very first time when he was 14.

But he’d never been inside at night.

Their footsteps echoed in the lobby, and they passed the front desk without anyone stopping them. The museum was empty, save from the two of them.

And a little cold, but he could live with that.

“What do you want to start with?”

Maybe it wouldn’t be so bad, even with Dazai here. “Western collection,” he declared, finding his way to the right wing with ease.

It was as dark as the entrance, but soft lights shone from behind the paintings, meaning they could still see them.

“I don’t know anything about art,” Dazai went on, stopping right beside him to look at the first painting. His voice made him sound like he was preparing something. “What’s this one?”

“Salvador Dalí,” Akutagawa answered curtly. Dazai hmm-ed again. “What?”

“Well? What about this Doli man?”

“Dalí.” He scoffed. “Spanish painter, from the surrealist movement. This one is an untitled work dating 1942, a mural design, for a woman called Helena Rubinstein. There are two others like this one, on exhibit here as well.” He gestured to two other artworks. “Not his most famous works, however. The Persistence of Memory, for example, is in New York, while The Great Masturbator—” He pointedly ignore Dazai’s snort. “— is in Spain.”

When Dazai nodded, they moved on to the next work. They went through the Western collection to the Japanese artists, Akutagawa telling him a few facts about each artwork stopped in front of.

Dazai almost didn’t speak, only occasionally prompting Akutagawa to go on — and Akutagawa found that he didn’t mind.

He liked talking about art, especially when someone was listening. And Dazai still seemed actually interested.

It was weird.

“This one,” he went on, showing a three parts artwork, “is Fujiwara Yasumasa Playing the Flute in the Moonlight, by Tsukioka Yoshitoshi. Dates back 1883. A depiction of—” He trailed off. He had an easier time to talk about this with Dazai around, now that he’d been doing it for over an hour, but Dazai staring at him was throwing him off. Everything Dazai did tonight was throwing him off. “It’s—” He paused. “Dazai-san, may I ask a question?”

“Sure!” He leaned against him, one of his hands resting on his back. Akutagawa scooted away a bit. “Unless it’s one I have already answered.”

“Why are you making me speak?” When Dazai looked at him blankly, he elaborated. “You have never liked me speaking too much before, but now you want me to keep talking.”

“Oh, you noticed? You are more observant than you—” Akutagawa glared at him. “Fine, fine, I’m caught.”

“So?”

He shrugged, turning back to look at the painting, hands on his hips. “I figured you would be more pleasant to be around if you talked about something you liked.”

Akutagawa’s stomach dropped, twisting in embarrassment.

This man still had enough power over him to easily make him feel like a child.

“Nothing forces you to spend time with me if you would rather not to.” He kept his face carefully void of emotion, trying not to let his hurt and annoyance show.

“What?” Dazai swung back on his heals to face him again. His mouth made a silent “oooh”, before he shook his head and laughed. “This wasn’t supposed to sound like that. I just wanted that grumpy face of yours to soften up a little.” He pouted. “But if you insist on thinking there is a secret agenda behind our date night—”

“Date?” When had all this become a date? Hadn’t Dazai thought to inform him before making it a date?

“What else did you think it was?”

“I don’t know,” he snapped, feeling the frustration build up. “I never know what to expect from you or—” he took in a deep breath. “Or what you have to gain from me talking your ears off about art.”

“Do I need to have something to gain from spending time with you? Why can’t I just like hanging out with you?”

He had just said he was unpleasant to be around — not that Akutagawa didn’t know he wasn’t exactly the best company to keep. Still, his scowl deepened — he didn’t get it. He didn’t think he would ever understand Dazai.

Before he could answer out loud, light flooded in the area. “Hey! What are you doing here?!”

“Security!” Dazai grabbed his hand and pulled him into a run.

“I thought you took care of it!”

“I never said anything about that!”

“The door was open! You don’t take care of the security before breaking into a building?”

“I forgot!”

“You—”

“Come back here, you two!”

Dazai dragged him into another corridor, and they took a few more turns, bringing them back the museum lobby. They jumped over the reception counter and Dazai shoved the both of them under the desk.

They held their breath as the security guard ran past them. He said something into his communicator, but did not see them, leaving the both of them uncaught.

“Well, that was close.”

Akutagawa nodded. He could feel Dazai's breath near him, and got a noseful of the perfume he was wearing — a nice perfume, he noted.

“To answer your question,” Dazai whispered, close to his ear, “I do, actually, have a secret agenda.” He raised his hand, thumb brushing against his lips. “What would you say if I told you it involved kissing you senseless and seducing you out of the mafia?”

Akutagawa had half a mind to bite him.

“I would say you have lost your mind.”

There was no need to seduce him out of anything. He was a lost cause, he always knew it, and never had any concerns in that regard. He was the Mafia’s attack dog, through and through.

And yet here he was, stuck in a small space with a traitor, with whom he was on a museum date.

He tried to stand up, but Dazai’s hand grabbed the back of his neck and tugged him down again.

“And you’d probably be right.” He dragged him further down, lips catching his, and Akutagawa’s breath caught in his throat.

It was messy and awkward, with Dazai’s teeth scraping at his, their noses bumping, their hiding place too small for it to be comfortable.

And the only thing Akutagawa could do — wanted to do — was to welcome it and get drunk on the warmth Dazai Osamu, of all people, was giving him.

When he let go, Dazai grinned. “You’d be right,” he said again, “but that was part of my plan for tonight, so I think I have a decent chance at the seducing idea.”

Akutagawa refused to answer. Maybe because if he talked, he would just say he would like to see him try, and Dazai would see it as a challenge more than an attempt to deter him.

Maybe Akutagawa himself would mean it as an encouragement.

Pulling himself over the counter, he made sure no guard was around. “The way is clear.”

They sneaked out the same way they sneaked in, by the front door. It was still unlocked, so they simply closed it behind them. As they left, they started hearing sirens, and they broke into another run. If the museum security had called the police, they would rather not be too close when they arrived.

It was only when they were far away from the museum that they came to a halt.

Once they were sure they hadn’t been chased, they started walking again, looking for a more crowded area. Dazai stretched his arms above his head. “That was fun! Let’s do it again, some time!” He tapped his chin with his finger. “What about the Cultural History Museum?”

Akutagawa knew this one very well. He had gone countless of time and could probably give someone the whole guided visit from memory alone.

“Same day, same time, next week?” Dazai offered.

He gave Dazai a jerky nod.

“That’s what I thought.” Dazai sent him a thin, knowing smile. “Let’s see how crazy I really am, uh?”

"I’ll go home now.”

“You do you.” He waved as Akutagawa turned back to leave and called out: “See you next week!”

#bsd #bsdrarepairvday #dazaku #daaku #dazai osamu #akutagawa ryuunosuke #i skipped day 5 and 7 for now bc they're not ready

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eendacott-blog · 5 years

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[Wk5] Lectures

Morning Lecture - “Don’t Roll Your Own”

John Bently - Programming Pearls -> Implementing binary search algorithms, went through finding flaws, “gives” the correct solution, later finds a bug in his solution

Last week’s motto - “every contact leaves a trace”

Movie - Enron: The Smartest Guys in the Room

2. Cryptographic Practical

WEP (Wired Equivalent Privacy)

- Most flawed protocol ever -> so many vulnerabilities - Once it was discovered, everyone stopped using it and upgraded -> Stupid legislation around hacking -> Don’t stop the bad guy but hinders the good guy -> Guy in court on an open network, told the judge, got arrested and jailed - RC4 are combined to make a key using XOR -> send encrypted packet with a header with IP address of the destination and the IP address of the sender

Phreaking - blind hackers we’re good at making the right tones -> should not have mixed data and control - IMPOSSIBLE

Hashing - integrity and authentication

- poor cousin of cryptography, but just as important but less important - MD5 - Message Digest 5 -> how many bits? -> once its broken, open to other break -> can be broken in under a minute - New one introduced by the NSA, latest is SHA2 (previously SHA0, SHA1) - From a competition now have SHA3 - Recent data breaches with passwords based with MD5. If 160 bits 2^80 bits on average to break it.

RESEARCH: - TCP/IP - Separating data and control

Evening Lecture

OPSEC

- Protect info that could be used by the enemy against them - First formalised for Vietnam War - Information together gives people a lot of power Snowden - “In every step, in every action...” Art of War 3:18 How: - If you don’t need to share information, don’t - Make sure it can’t be traced back to you - No information is still information - Keep your identity secret e.g. VPN, False Identities - Be forgettable - blend in. If you stand out you’ll be remembered Case Studies: - M16 Chief-to-be exposed on Facebook by his Wife - Eldo Kim - called in a bomb threat to get out of the exam - Silk Road (Dread Pirate Roberts) -> creator asked for help on StackOverflow Extra: Incognito Challenge

PASSWORDS

- Passwords are weak -> hard to remember -> hard to type -> complicated rules -> regular password renewal -> little incentive to create unique passwords X Stored in plaintext X Bad hashing -> project - rainbowcrack -> Wordpress still uses MD5 Case Studies: - LinkedIn Hack 2012 -> Instead just add a unique salt (size of the salt is at least 256 bits) -> use sCrypt or bCrypt - The future is password-less using biometrics - Password generation -> correcthorsebatterysample - long without English grammar patterns (4 words) -> passphrase - long and back lexicon with good syntax NIST2016 Passwords Extra: What is phone porting?

Crypto Hash History

- MD5 (1991) - Rivest - 128 bits BROKEN - SHA0 - replaced almost immediately with... BROKEN - SHA1 (1995) - NSA - 160 bits BROKEN - SHA2 (2001) - NSA - 224/256/384/512 bits NOT YET - SHA3 (2015 - standard accepted) - NIST competition (started 2006) - 224/256/384/512 bits NOT YET

- What does it mean to be “broken”? A: Property can be violated faster than brute force - MD5, SHA0, SHA1, SHA2 all use

Merkle-Damguard Construction

IV = initialisation vector f() takes into two things (IV/previous f() and the Message Block) and outputs one Eventually leads to a hash Note: - Password is only in the first block - You can’t change the message however you can extend the message by taking in the last hash and a message block -> producing a new hash

- MAC = h(key|data) -> authentication = hardest problem in security - Length extension attack Note: - Password is only in the first block - You can’t change the message however you can extend the message by taking in the last hash and a message block -> producing a new hash

Digital Signatures RSA DSA Authentication and Integrity - Private key to encrypt it and decrypt it with your public key - Never sign something that someone gave you to sign -> Change it and then sign it so that if they did something funny it’ll break - Time consuming - Instead sign the hash and get them to un-hash it

Collision Importance PDF Example - Have heaps of metadata e.g. GPS location. If the GPS was 32 bits then we could change the document 2^32 times. Takes 2^16 to break.

Key Stretching: - crypt = Robert Morris 1978 - bCrypt (1996) = password hashing in open BSD and some Linux - sCript (2009)

Password Stretching - custom function to hash passwords, really slow

Research

- SHA1 read about the recent breaks google plus the recent break this year - Estimable table of speed to crack passwords - what is the likely annual speedup/cost reduction?

#comp6441

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