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  • Nov 9, 2026, 9:41 PM
    Base64 is somewhat limiting for ASCII art, but I present a quantum proof™ RSA certificate:
    A long (4000-bit) RSA certificate where the public key was crafted such that it's base64 encoding draws "NO HACK PLS" in ascii art.
    💬 4🔄 15⭐ 20

Replies

  • Nov 9, 2026, 9:51 PM
    Best viewed with
    openssl s_client -connect funnies.maurycyz.com:443 2>/dev/null < /dev/null | sed -n /BEGIN/,/END/p | grep --color=yes -z "[B]"
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  • Nov 10, 2026, 3:50 AM

    @nothacking I'm honestly pretty surprised that this is possible at all... but... math:tm:

    cryptography continues to surprise me!

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  • Nov 10, 2026, 7:21 AM
    @sodiboo@gaysex.cloud The key asks nicely for people to not hack it. The hope is that anyone with a quantum computer will feel bad and go factor someone else's key.

    /s

    My server does support post-quantum key exchange (X25519MLKEM768) so it's safe against quantum store-now-decrypt-later attacks. This is not a concern for signature schemes, so there's no real need to upgrade certificates until after quantum computers become realistic threat.
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  • Nov 10, 2026, 11:19 PM

    @nothacking @davidgerard @bigiain Sorry, not sorry. I had to. Here's a handy private key to go with it (this is a valid key, hence the messy bits where the ASN.1 structure requires things like the header for each sequence specifying the modulus, exponent, etc)

    Alt text contains the key as ASCII as well

    a valid RSA private key where the base64-encoded content has an ASCII representation of a large digit 4.

The actual private key is as follows (warning for screen readers: you are about to sit through a LOT of ++++++):

-----BEGIN PRIVATE KEY-----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-----END PRIVATE KEY-----
    💬 0🔄 91⭐ 227