If anyone wants to put the eMudhra private key on a T-Shirt:

[hanno@mastodon.social]

@q you need to zero-pad if you have leading zeros. Otherwise, you have a timing vulnerability.

[q@glauca.space]

@cassiopeia

echo '-----BEGIN EC PRIVATE KEY-----
MA8CAQEEAQSgBwYFK4EEACI=
-----END EC PRIVATE KEY-----' | openssl ec -text

[dequbed@mastodon.chaosfield.at]

@hanno @q Oh no! Once again honest cryptography is foiled by evil compression!

[q@glauca.space]

@cassiopeia here's the ASN.1 structure then

SEQUENCE {
  INTEGER { 1 }
  OCTET_STRING { `04` }
  [0] {
    # secp384r1
    OBJECT_IDENTIFIER { 1.3.132.0.34 }
  }
}

[messieass@procial.tchncs.de]

@q@glauca.space
That's...


short.

[g33katwork@infosec.exchange]

@q @cassiopeia More ASN.1 fluff than actual key material. Beautiful.

[cassiopeia@thicc.horse]

@G33KatWork @q i didnt realize these things had such a big spec holy shit

[huronbikes@cyberplace.social]

@q @cassiopeia I saw that the private key had leaked, but that it bakes down to a value of 4 is levels of facepalm I had not anticipated.

[templailloahi@mastodon.social]

@q @cassiopeia No way they just did this.

https://xkcd.com/221/

[kbruen@procial.tchncs.de]

@q@glauca.space How is it shorter than the header or the footer? XD

[viss@mastodon.social]

@q

https://infosec.exchange/@flyingpenguin/117475240876059852

[rk@mastodon.well.com]

@q

We need to have a shirt with the DeCSS prime, the eMudhra key, the recent NSA EC seeds…

[catsalad@infosec.exchange]

@q In QR form :3

4️⃣

[ricardoharvin@mstdn.social]

@q

Fantastic

[erin@fedi.quiescent.nexus]

@q@glauca.space

-----BEGIN EC PRIVATE KEY-----
MA8CAQEEAUOgBwYFK4EEACI=
-----END EC PRIVATE KEY-----

[flipper@mastodonapp.uk]

@q what 4?

[jbaert@mastodon.social]

@q tiny shirt!

[thesupertechie@lgbtqia.space]

@q A T-Shirt? I'll take 600!

/j, obviously

Though I'd really love shirts with that on it, with no other context.

[carpetbomberz@mastodon.online]

@q

Better than the CopyLeft DeCSS t-shirts, and fewer characters too. ️

[dermoth@jasette.facil.services]

@q Or the decoded version:

```
Off Hex Dump Value
---------------------------------------------------------
00: 30 0f ; SEQUENCE (15 bytes)
02: 02 01 01 ; INTEGER = 1 (EC Private Key Version)
05: 04 01 04 ; OCTET STRING (1 byte) = 04 (Private Key)
08: a0 05 ; [0] Explicit Tag (5 bytes)
0a: 66 05 ; TAG (5 bytes)
0c: 2b 81 04 ; OID VALUE ...
0f: 00 22 ; = .3.132.0.34 (secp384r1)
```