HTTP/2 200 date: Fri, 01 Aug 2025 16:08:57 GMT content-type: text/plain; charset=utf-8 content-security-policy: default-src 'self' 'unsafe-inline' data: https://datatracker.ietf.org/ https://www.ietf.org/ https://ietf.org/ https://analytics.ietf.org https://static.ietf.org; frame-ancestors 'self' ietf.org *.ietf.org meetecho.com *.meetecho.com cross-origin-opener-policy: unsafe-none etag: W/"dcad532ffae63c4357964f6c3b63239b" referrer-policy: strict-origin-when-cross-origin strict-transport-security: max-age=3600; includeSubDomains vary: Cookie, Accept-Encoding x-content-type-options: nosniff x-frame-options: SAMEORIGIN cf-cache-status: MISS expires: Fri, 01 Aug 2025 20:08:57 GMT cache-control: public, max-age=14400 set-cookie: __cf_bm=0lk9He26UwRbsniiJ1DB6YjMWz5FaWdOWDrnRN53ows-1754064537-1.0.1.1-eotj7czAHN_1Hd_r8Xqo4YUpf_aaQQ3bWsOYonCE.yGiVqW3FFaz1O190M0uiDLLezSGorlO_R2iFgNyXXRH_s_.8Fdp80j2udl_IGSzJSw; path=/; expires=Fri, 01-Aug-25 16:38:57 GMT; domain=.ietf.org; HttpOnly; Secure; SameSite=None server: cloudflare cf-ray: 968698dc5b54c1bd-BLR content-encoding: gzip alt-svc: h3=":443"; ma=86400 @misc{rfc3851, series = {Request for Comments}, number = 3851, howpublished = {RFC 3851}, publisher = {RFC Editor}, doi = {10.17487/RFC3851}, url = {https://www.rfc-editor.org/info/rfc3851}, author = {Blake C. Ramsdell}, title = {{Secure/Multipurpose Internet Mail Extensions (S/MIME) Version 3.1 Message Specification}}, pagetotal = 36, year = 2004, month = jul, abstract = {This document defines Secure/Multipurpose Internet Mail Extensions (S/MIME) version 3.1. S/MIME provides a consistent way to send and receive secure MIME data. Digital signatures provide authentication, message integrity, and non-repudiation with proof of origin. Encryption provides data confidentiality. Compression can be used to reduce data size. This document obsoletes RFC 2633. {[}STANDARDS-TRACK{]}}, }