情報リテラシ第一 情報セキュリティと情報倫理理学系教養科目（情報）実施委員会

情報倫理とセキュリティクイックガイド 東工大のグイドへのリンク ウィキペディア Information security (英語） 情報セキュリティ（日本語） 英語ページは参考になります． 日本語ページはhum…

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情報セキュリティ

Source: https://www.securitymagazine.com/articles/91258-information-security-forum-releases-internet-of-things-guide

情報セキュリティー

Key concepts Security controls Risk management Typical black hat motivations Attack methods

Key concepts

Confidentiality 機密性 Integrity 完全性 Availability 可用性

Non-repudiation 否認防止

Source: https://www.comtact.co.uk/blog/what-is-the-cia-triad

Security ControlsAdministrative policies, procedures, standards, guidelines laws, regulations

Logical authentication, firewalls, intrusion detection, encryption principle: least privilege

Physical doors, locks, alarms, cameras, security guards principle: separation of duties

Risk Management

Security in depth At design time:

1. strengthen system A 2. “what if?”: strengthen B assuming A is violated 3. repeat at each level

Typical dark motivesDestruction attacks of devices/infrastructures, harassment, …

Information / money theft identity theft, spy activities, account violation, ransomware

Stealing processing power spambot farms

Self-infatuation (自慢)

Attack methods (generic)

Eavesdropping (盗み聞き) Masquerading (仮装する) Replay attack (リプレイ攻撃) Man-in-the-middle (中間者攻撃) Session highjacking

Normal communication

communication

Attacker

Alice Bob

(マーヴィン)

(ボブ)(アリス)

Eavesdropping

communication

Attacker

Alice Bob

(マーヴィン)

(ボブ)(アリス)

Masquerading

communi

cation

Attacker

Alice Bob

(マーヴィン)

(ボブ)(アリス)

Replay attack

communication

Attacker

Alice Bob

A, B, C, D

(マーヴィン)

(ボブ)(アリス)

Replay attack

commun

i

cation

Attacker

Alice BobA, B, C, D

(マーヴィン)

(ボブ)(アリス)

Man-in-the-middle

communi

cation

Attacker

Alice Bobcommuni

cation

(マーヴィン)

(ボブ)(アリス)

Session highjacking (step 1)

communication

Attacker

Alice Bob

A, B, …

(マーヴィン)

(ボブ)(アリス)

Session highjacking (step 2)

commun

i

cation

Attacker

Alice Bob

communication

…, C, D

(マーヴィン)

(ボブ)(アリス)

Attack vectorsHuman “social engineering”, phishing, garbage diving

Hardware backdoor, physical attack

Software / Network next slide …

Program threatsTrapdoor Trojan horse Logic bomb Virus / worm Denial of service (DoS) Spyware / monitoring Covert channels

Some countermeasuresFirewall Phishing monitor Anti-virus software Backup Cryptographic protection (暗号法) encryption(暗号化), privacy, authentication(認証), certification

Privacy mode, adblock TOR …

情報倫理

Source: https://uxdesign.cc/ethical-design-and-accessibility-a287c930a8ab

Copyright for Digital Technologies

Software copyright Software license Reverse engineering

Copyright on programs

Copyright on program source code, executable code, programming libraries Copyright on assets (images, sounds, characters, ...)

class Raymond(p: ProcessConfig, initialParent: PID) extends ReactiveProtocol(p, "Raymond Mutex") { private var interested_i = false private var parent_i = initialParent private var queue_i = Seq.empty[PID]

def onSend = { case MutexClient.Request => // operation acquire_object() interested_i = true if (parent_i != me) { queue_i = queue_i :+ me if (queue_i.size == 1) SEND( Request(me, parent_i) ) } else { DELIVER(MutexClient.CanEnter) } case MutexClient.Release => // operation release_object() interested_i = false if (queue_i.nonEmpty) { val pk = queue_i.head queue_i = queue_i.tail assert(pk != me) SEND (PrivObject (me, pk)) parent_i = pk if (queue_i.nonEmpty) SEND (Request (me, parent_i)) } }

listenTo(classOf[Request]) listenTo(classOf[PrivObject]) def onReceive = { case Request(pk,_) if parent_i == me && interested_i=> queue_i = queue_i :+ pk case Request(pk,_) if parent_i == me => parent_i = pk ; SEND(PrivObject(me, pk)) case Request(pk,_) => queue_i = queue_i :+ pk if (queue_i.size == 1) SEND(Request(me, parent_i))

case PrivObject(_,_) => val pk :: tail = queue_i queue_i = tail if (pk == me) { parent_i = me DELIVER(MutexClient.CanEnter) } else { parent_i = pk SEND( PrivObject(me, pk) ) if (queue_i.nonEmpty) SEND ( Request(me, parent_i) ) } } }

case class Request (from:PID, to:PID) extends UnicastMessage case class PrivObject(from:PID, to:PID) extends UnicastMessage

Copyright on programs

ルック・アンド・フィール (“look-and-feel”) pull-down menu vs pop-up menu trash can vs. recycle bin logo vs. start menu

Software licenseFree software / Open source “free as in beer” or “free as in freedom”

Variants BSD, MIT license, Apache GPL, LGPL Creative commons

Software licenseFreeware free to use restrictions may apply

Shareware limited + pay for unlock paid content

Commercial license personal, site, floating license

Summary & key pointsInformation security concepts: confidentiality, integrity, availability, non-repudiation controls: administrative, physical, logical attack vectors, program threats

Information ethics copyright software license

Next quarter?Information literacy II - processing data, visualizing (python/matplotlib) - scientific writing (LaTeX) - preparing presentations

Less talking, more doing! First lecture, June 25 at 8:50 Web page:

https://xdefago.github.io/InfoLite/y20-2q/

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