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John Preuß Mattsson
(John Preuss Mattsson)

John is an expert in cryptographic algorithms and security protocols at Ericsson Research in Stockholm, Sweden. His work focuses on applied cryptography, security protocols, privacy, IoT security, post-quantum cryptography, and trade compliance. During his 15 years at Ericsson, he has worked with a lot of different technology areas and been active in many security standardization organizations including IETF, IRTF, 3GPP, GSMA, and NIST where he has significantly influenced Internet and cellular security standards. In addition to designing new protocols, John has also found significant attacks on many algorithms and protocols. John holds an MSc in engineering physics from KTH Royal Institute of Technology, Sweden, and an MSc in business administration and economics from Stockholm University.


Role Group Email
Chair Javascript Object Signing and Encryption (jose)

External Resources

Name Value
GitHub Username emanjon
GitHub Username johnmattsson
GitLab Username coffeevortex
Additional Web Page
Additional Web Page

RFCs (13)

RFC Date Title Cited by
RFC 6043 Mar 2011 MIKEY-TICKET: Ticket-Based Modes of Key Distribution in Multimedia Internet KEYing (MIKEY) 5 RFCs
RFC 6309 Aug 2011 IANA Rules for MIKEY (Multimedia Internet KEYing)
RFC 8221 Oct 2017 Cryptographic Algorithm Implementation Requirements and Usage Guidance for Encapsulating Security Payload (ESP) and Authentication Header (AH) 8 RFCs
RFC 8442 Sep 2018 ECDHE_PSK with AES-GCM and AES-CCM Cipher Suites for TLS 1.2 and DTLS 1.2 1 RFC
RFC 8613 Jul 2019 Object Security for Constrained RESTful Environments (OSCORE) 18 RFCs
RFC 8870 Jan 2021 Encrypted Key Transport for DTLS and Secure RTP 3 RFCs
RFC 9175 Feb 2022 Constrained Application Protocol (CoAP): Echo, Request-Tag, and Token Processing 4 RFCs
RFC 9190 Feb 2022 EAP-TLS 1.3: Using the Extensible Authentication Protocol with TLS 1.3 2 RFCs
RFC 9191 Feb 2022 Handling Large Certificates and Long Certificate Chains in TLS-Based EAP Methods 2 RFCs
RFC 9310 Jan 2023 X.509 Certificate Extension for 5G Network Function Types
RFC 9430 Jul 2023 Extension of the Datagram Transport Layer Security (DTLS) Profile for Authentication and Authorization for Constrained Environments (ACE) to Transport Layer Security (TLS)
RFC 9528 Mar 2024 Ephemeral Diffie-Hellman Over COSE (EDHOC) 2 RFCs
RFC 9529 Mar 2024 Traces of Ephemeral Diffie-Hellman Over COSE (EDHOC)

Active Internet-Drafts (17)

Expired Internet-Drafts (53)

(Excluding replaced Internet-Drafts.)

Internet-Draft Activity