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colmmacc's profile
Colm MacCárthaigh
Colm MacCárthaigh
Colm MacCárthaigh
@colmmacc

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Colm MacCárthaigh

@colmmacc

AWS, Apache, Crypto, Irish Music, Haiku, Photography

Seattle
notesfromthesound.com
Joined April 2008

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    Colm MacCárthaigh‏ @colmmacc May 13
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    I don't know who needs to know this, but a cryptographic seed can safely generate about 700M times its size in secure random output. Meanwhile a Sequoia seed can generate a Redwood tree that is about 2.5B times its volume.

    10:08 PM - 13 May 2020
    • 23 Retweets
    • 225 Likes
    • Yehuda Lindell James Abley 😷 Cosmin Ilie Napoleon 'Ike' Jones Donal Hunt 🇮🇪🇪🇺 Toby Allen lostcol0ny R. Ou Anas Khattar
    11 replies 23 retweets 225 likes
      1. New conversation
      2. Natanael, tech janitor‏ @Natanael_L May 14
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        Replying to @colmmacc @CiPHPerCoder

        It's not really a linear relationship for cryptographic seed sizes. The security often rely on the "birthday bound" which depends on cipher block size. The outdated cipher 3DES-CBC w/ 64 bit blocks (although the key is longer) is safe for ~785 GB data, that's 40B times expansion.

        1 reply 0 retweets 1 like
      3. Colm MacCárthaigh‏ @colmmacc May 14
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        Replying to @Natanael_L @CiPHPerCoder

        That doesn't sound right. I'm not sure what the usage limits would be now in light of sweet32, but it'd have to be much much lower.

        3 replies 0 retweets 0 likes
      4. 5 more replies
      1. Graham Jenson‏ @GrahamJenson May 13
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        Replying to @colmmacc

        Sequoia security is all bark no bite though

        0 replies 1 retweet 16 likes
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      1. Theo Schlossnagle‏ @postwait May 13
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        Replying to @colmmacc

        A crypto seed doesn't need additional entropy to generate that output. A Sequoia seed requires pure entropy to grow.

        0 replies 1 retweet 7 likes
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      1. Jonathan Kozolchyk @  🏡‏ @seakoz May 13
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        Replying to @colmmacc

        My family was just discussing this at the dinner table tonight.

        0 replies 0 retweets 12 likes
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      1. Victor Michel‏ @vic_mic_ May 13
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        Replying to @colmmacc

        Well, if I got it right, a human zygote can generate a human almost 17B times its volume - we are so much better! That being said, the average password entropy of redwood trees might actually be better than that of humans :)

        0 replies 0 retweets 5 likes
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      1. Scott Arciszewski‏ @CiPHPerCoder May 14
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        Replying to @colmmacc

        So what you're telling me is that "SeedSpring" was a bad name and I should've gone with Sequoia?https://github.com/paragonie/seedspring …

        0 replies 1 retweet 1 like
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      1. Brian Hall‏ @IsForAt May 13
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        Replying to @colmmacc

        That is absolutely beautiful. Thank you for sharing! It's awe inspiring to think how far out understanding of computing and science has come and still pales with so much to nature. I expect it will always be so, and when it isn't, then we have issues!

        0 replies 0 retweets 2 likes
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      1. christine traxler‏ @t_fiddler May 13
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        Replying to @colmmacc

        Just finished Richard Powers’ novel “The Overstory” —perfect tie-in. Thank you!

        0 replies 0 retweets 1 like
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      1. Denish Mumbaiwala‏ @DenishdMenace May 13
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        Replying to @colmmacc

        But a seed can only grow one tree...

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