Independent Submission                                          J. Schuh
Request for Contact: 4711                            julian.schuh.global
Category: Informational                                     October 2026


Julian Schuh@julez · he/him
                  Contact Information and Public Keys

Abstract

   This document provides general info, contact addresses and public
   keys of Julian Schuh ("julez", he/him), infrastructure enthusiast and
   network engineer at Karlsruhe Institute of Technology. Core expertise
   includes DNS, IPv6, and the integration of network-adjacent services.
   Also: home automation, CCC; hard music devotee.

Table of Contents

   1.  Contact . . . . . . . . . . . . . . . . . . . . . . . . . . .   1
   2.  S/MIME  . . . . . . . . . . . . . . . . . . . . . . . . . . .   2
   3.  SSH . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   2
   4.  OpenPGP . . . . . . . . . . . . . . . . . . . . . . . . . . .   2
   5.  Autonomous Systems  . . . . . . . . . . . . . . . . . . . . .   3
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   3
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   3

1.  Contact

1.1.  Personal

   email      julian [at] schuh [dot] global
   matrix     @julez:julez.in
   signal     julez.99
   mastodon   @julez@chaos.social
   RIPE DB    JS21379-RIPE

1.2.  Work

   email      julez [at] kit [dot] edu
   matrix     @zd8187:kit.edu
   RIPE DB    JS22130-RIPE

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RFC 4711                  Contact for J. Schuh              October 2026


2.  S/MIME

2.1.  Personal

   Subject:      Julian Schuh
   Email:        julian [at] schuh [dot] global
   Issuer:       HARICA S/MIME RSA
   Key:          RSA-3072
   Valid from:   2026-05-18
   Expires:      2028-05-17
   SHA-256:      28:F7:C9:1E:68:4D:72:EE:3A:62:63:FD:1E:1C:A5:E9
                 37:EE:F8:73:89:91:C4:92:8D:D3:0D:1B:4A:38:9B:47

   The certificate is available at [SMIME-1].

2.2.  Work

   Subject:      Julian Schuh
   Email:        julian.schuh [at] kit [dot] edu
                 julez [at] kit [dot] edu
                 schuh [at] kit [dot] edu
   Issuer:       GEANT S/MIME RSA 1
   Key:          RSA-4096
   Valid from:   2025-12-18
   Expires:      2027-12-18
   SHA-256:      17:D1:DE:93:A3:8B:C4:3C:18:01:BC:49:98:12:5B:98
                 B8:A9:CE:FB:DC:69:95:98:11:77:13:F4:BE:B7:B9:A9

   The certificate is available at [SMIME-2].

3.  SSH

   ssh-ed25519 (main-personal)
      SHA256:wasDBLcofG4fJ5cEPVCtESl5E5FfF1fd50pSYvyw6aA
      ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIFnCSUa9P9ypOWYLLiPJU/mDEYizQX
      peeNqUaKrCNMNI

   The full list is available at [AUTHKEYS]. A detached S/MIME signature
   of that list is at [AUTHKEYS-SIG].

4.  OpenPGP

   Algorithm:    rsa4096
   Created:      2016-01-28
   Expires:      2029-10-21
   Fingerprint:  BD99 81DC 6B11 6B0F 0B03  F7C8 D255 C770 EC15 BB63
   User ID:      Julian Schuh <julian [at] schuh [dot] global>
   User ID:      Julian Schuh <julez [at] julez [dot] in>
   User ID:      Julian Schuh <julez [at] julez [dot] io>

   The key MAY be retrieved from [PGP-1].

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RFC 4711                  Contact for J. Schuh              October 2026


5.  Autonomous Systems

   AS34878    Karlsruhe Institute of Technology
      Roles:      tech-c, noc
      See [AS34878-RIPE] and [AS34878-BGP].

   AS202539   Personal ASN
      Roles:      admin-c, tech-c
      See [AS202539-RIPE] and [AS202539-BGP].

   AS213068   KIT Anycast AS
      Roles:      admin-c, tech-c
      See [AS213068-RIPE] and [AS213068-BGP].

   AS204680   KIT Student AS
      Roles:      admin-c
      See [AS204680-RIPE] and [AS204680-BGP].

6.  Security Considerations

   Fingerprints SHOULD be verified out-of-band before use. The keys and
   certificates listed here are published so that others can contact the
   author securely; this document makes no statement about their
   trustworthiness beyond the signature described below.

   This document and [AUTHKEYS] are signed with the certificate listed
   as [SMIME-1].

   A detached signature of this document is at [SIG] (contact.txt.p7s),
   and the plain-text version at [TXT] (contact.txt). Verify with:

     $ openssl cms -verify -binary -inform DER \
         -in contact.txt.p7s -content contact.txt

   The same command, with authorized_keys.p7s and authorized_keys in
   place of contact.txt.p7s and contact.txt, verifies the SSH key list.

7.  References

   [SMIME-1]
      https://julian.schuh.global/julian_schuh_smime_personal_2026.pem
   [SMIME-2]
      https://julian.schuh.global/julian_schuh_smime_work_2025.pem
   [AUTHKEYS]      https://julian.schuh.global/authorized_keys
   [AUTHKEYS-SIG]  https://julian.schuh.global/authorized_keys.p7s
   [PGP-1]
      https://julian.schuh.global/julian_schuh_openpgp_2016_ec15bb63.asc
   [AS34878-RIPE]
      https://apps.db.ripe.net/db-web-ui/query?searchtext=AS34878
   [AS34878-BGP]    https://bgp.tools/as/34878
   [AS202539-RIPE]
      https://apps.db.ripe.net/db-web-ui/query?searchtext=AS202539
   [AS202539-BGP]   https://bgp.tools/as/202539

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RFC 4711                  Contact for J. Schuh              October 2026

   [AS213068-RIPE]
      https://apps.db.ripe.net/db-web-ui/query?searchtext=AS213068
   [AS213068-BGP]   https://bgp.tools/as/213068
   [AS204680-RIPE]
      https://apps.db.ripe.net/db-web-ui/query?searchtext=AS204680
   [AS204680-BGP]   https://bgp.tools/as/204680
   [SIG]           https://julian.schuh.global/contact.txt.p7s
   [TXT]           https://julian.schuh.global/contact.txt

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