24 Security

Chapter 24 - Security #

This chapter will be getting merged into Chapter 23

Before we get started on these next two chapters I want to get something out of the way:

Security is important, and should be taken seriously. But it’s also a field of people who are tired of your shit, Karen. We don’t wear suits and we won’t do something just to look ‘professional’.

If I want to curse, if I want to put furry art on these pages, I will do as I fucking please.

Real ‘Security Professionals’ own the word hacker, and real hackers don’t give a shit about what society tells them to do. Hacking is about finding how systems can do something far outside of what the original desigener ever even considered, about finding solutions so elegant they’re art, about breaking boundries. If you want to keep with professionalism or tradition you’re in the wrong place.

As Soatok put it:

If people who are sharing great content–be it on Twitter or on their personal blog–do something that prevents you from sharing their content with your coworkers, the problem isn’t us.

No, the real problem is your coworkers and bosses, and the unquestioned culture of anal-retentive diversity-choking bullshit that pervades business everywhere.

With that out of the way, let us begin:

./missing-semester - Security

xkcd messaging systems

‘SMS is just the worst, but I’m having trouble convincing people to adopt my preferred system, TLS IRC with a local server and a patched DOSBox gateway running in my mobile browser.’

XKCD #2365

focus on how to write secure programs, protect hardware, etc.

ESDA is bad

Passwords #


Cryptography #

How To Learn Cryptography as a Programmer (Soatok)

A furry writes about Cryptography but trust me you should actually read this (Soatok)

Hashing #

Note there’s generall two ‘classes’ of hashing- hashing for cryptograhic security (Passwords) and for just general usage, the cryptograhic ones typically are siginicantly more computationally intensive to make it harder to brute force all possible keys. Also most cryptograhpic hashing algorithms go to much greater lengths to avoid collisions. Also, salting is relevent here: Salting (Wikipedia)

Network Security #

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Source, Artist (used with permission from Phyxius)

Responsible Disclosure #


[TODO - thinking about an outline, please ignore this…]

  • DOs and DO-NOTs
    • DO sanitize all your inputs
    • DO NOT use random crypto libraries
    • DO NOT manage your own memory
      • DO NOT trust something to abstract away memory managment perfectly either
        • python x=1 is y=1 but x=101 is not y=101
    • DO NOT assume…
      • the hardware is secure
        • Are you in a VM? Are their hardware sidechannel attacks?
      • that things wont break
        • that things wont overflow
        • that the stack can’t be smashed
        • that there’s not somebody trying to break your shit
      • That you’re talking to who you think you are
      • That data won’t get leaked
      • That your users will have any idea why a signature, key, or anything else is
      • That your users give a shit about security
      • The code you write is the code that will run
        • The compiler may not be magic, but it sure does feel like it
    • DO NOT claim unhackability
    • DO NOT use the cool, flashy, new thing on the block for sensative data
    • DO NOT assume that just because it’s old and nobody has found a bug, that it’s secure
    • DO NOT trust humans, espically those in customer support
  • Email sucks
  • PGP really sucks
  • Authentication!=Authorization ; Auth!=Identity
  • Metadata can bite you in the ass
  • Threat modeling
  • Sandboxes
  • Firewalls, intrusion detection, DNS blackholes, Fail2Ban, etc.
  • Malware types
    • ++ Cryptolockers, rootkits, and the real nasty shit
  • Privacy on the Web, Fingerprinting
    • What should your employer be able to see?
  • Stalkerware
  • Expect everything to go to shit
    • Backups
    • Keeping uptime
  • IOT, Elections, and Infrastructure

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