Authors, While reviewing this document during AUTH48, please resolve (as necessary) the following questions, which are also in the XML file.
1) <!-- [rfced] Is "For this document" needed? Original: For this document and depending on the policies of the communications system, a calling party could be either the end user device (e.g., a SIP user agent (UA)) or a network service as part of a telephone service provider. Perhaps: Depending on the policies of the communications system, a calling party could be either the end user device (e.g., a SIP user agent (UA)) or a network service as part of a telephone service provider. Alternatively, perhaps: As defined in this document, depending on the policies of the communications system, a calling party could be either the end user device (e.g., a SIP user agent (UA)) or a network service as part of a telephone service provider. --> 2) <!-- [rfced] FYI - We have added expansions for abbreviations upon first use per the RFC Style Guide (see https://www.rfc-editor.org/rfc/rfc7322.html#section-3.6). Please review each expansion in the document carefully to ensure correctness. UNI -> User-Network Interface (UNI) STIR -> Secure Telephone Identity Revisited (STIR) --> 3) <!-- [rfced] Are logo and icons an example of calling name info? Original: The STIR RCD specification [I-D.ietf-stir-passport-rcd] defines calling name, a logo or icon associated with the caller, and a call reason string. Perhaps: The STIR RCD specification [RFC9795] defines calling name (e.g., a logo or icon associated with the caller) and a call reason string. --> 4) <!-- [rfced] For readability, please consider the possible update below. Also, is the information not to be "considered" modifiable, or should it be not modifiable? Original: The insertion of the RCD Call-Info header field should be considered a trusted action based on trusted information, and the information MUST NOT be considered modifiable representing the best practice of determining the final representation of the caller RCD to the user. Perhaps: The best way to determine the final representation of the caller RCD to the user is to consider the insertion of the RCD Call-Info header field a trusted action based on trusted information, whereby the information MUST NOT be considered modifiable. --> 5) <!-- [rfced] It's unclear which section this sentence is referring to, as this document does not have a Section 8.2. Perhaps Section 10.2 is intended? Current: Section 8.2 provides high-level guidance on image formatting and related information. --> 6) <!-- [rfced] We are having trouble parsing this sentence. a) Are "fn", "photo", and "logo" fields AND properties, or should the text refer to the properties (e.g., 'If "fn", "photo", or "logo" are used...')? b) What MUST match? c) Should single quotes be used as follows, as it appears token names usually appear in single quote? purpose token -> 'purpose' token Original: The fields like "fn", "photo", or "logo" if used with the use of "icon" or calling name in From or P-Asserted-ID header field or purpose token, as described in the previous section, MUST match if present to allow the called party to clearly determine the intended calling name or icon. --> 7) <!-- [rfced] We are having trouble understanding how "or any future parameters that may be defined" relates to the text. "only" seems to limit the parameters that may be used, but "any future parameters" seems open ended (i.e., any parameter). Please review and consider whether the text can be clarified. Original: In the case that there is only a 'call-reason' or 'verified' parameter or any future parameters that may be defined and no need for a purpose parameter with no associated URI the null data URI, "data:" is used as the URI. --> 8) <!--[rfced] May this be rephrased to clarify "of whom"? Seemingly this is about the trusted relationship with the party from whom they receive the SIP request. Original: As a general principle of Call-Info header field information, the recipients ability to trust the 'verified' parameter is based on the trusted relationship of whom they are receiving the SIP request. Perhaps: As a general principle of Call-Info header field information, the recipients' ability to trust the 'verified' parameter is based on the trusted relationship with the party from whom they are receiving the SIP request. --> 9) <!-- [rfced] 'icon' vs. "icon" This term appears in single quotes (2 instances) and double quotes (6 instances); should it be consistent? Original: Example where the parameter verified="true" is used to represent that a verification procedure has been performed within a trust domain to indicate the 'icon' URL has been successfully verified: --> 10) <!-- [rfced] This sentence is difficult to parse. Please clarify. Original: This document defines the convention that when a Call-Info header field with a null data URI, "data:", a default purpose of "jcard" and adding a verified="true" indicates that the display-name information in either the From and/or P-Asserted-ID header field has been verified via RCD verification procedures. Perhaps: This document defines that the display-name information in either the From and/or P-Asserted-ID header field has been verified via RCD verification procedures when the following are present: * a Call-Info header field with a null data URI, "data:", * a default purpose of "jcard", and * verified="true". --> 11) <!-- [rfced] This sentence starts with "this hash value" and switches to "the integrity value", but the connection between these is unclear. Please review. Original: Typically, this hash value, assuming the URI and the resource pointed to the URI don't change between the STIR RCD PASSporT and the Call- Info URI value, the integrity value can be directly used as the same corresponding string in both the 'rcdi' claim and the 'integrity' parameter string value. Perhaps: Assuming the URI and the resource pointing to the URI don't change between the STIR RCD PASSporT and the Call- Info URI value, the integrity value can typically be used as the same corresponding string in both the "rcdi" claim and the 'integrity' parameter. --> 12) <!-- [rfced] We are having trouble parsing this sentence. Please clarify. Original: Note: the inclusion of both the 'verified' and 'integrity' when an 'rcdi' claim is included and the identity header field and included PASSporT is verified successfully is the suggested outcome. Perhaps: Note: The ideal outcome is to include the 'verified' and 'integrity' parameters in an "rcdi" claim and the identity header field, and to have the PASSporT verified successfully. --> 13) <!-- [rfced] We are unsure what "is a general anticipated process" means. Perhaps the text should refer to an "expected process" or an "accepted process"? Also, is the process a "general process" or is the process "generally anticipated"? Original: Because the 'rcd' Call-Info header field is inserted as part of the receiving part of the transition from NNI to UNI, the information populated in a received stir ‘rcd’ PASSporT that is verified is a general anticipated process for translating information into the 'rcd' Call-Info header field to transport the rich call data into the UNI toward the end user device. --> 14) <!-- [rfced] Should the text refer to the "jcard" and "icon" parameters here (i.e., lowercase and doublequotes)? Original: The following example provides both the STIR RCD PASSporT and the corresponding set of Call-Info header fields shows the use of multiple 'purpose' parameters to indicate a jCard and an icon and also a 'call-reason' parameter: --> 15) <!-- [rfced] The last sentence below is dense and hard to follow. Please review. Original (the sentence prior is provided for context): When one or more URIs are used in a jCard, it is important to note that any URI-referenced data, with the exception of the top-level usage of "jcl" as a URI to the jCard itself MUST NOT contain any URI references. In other words, the jCard can have URI references as defined in the jCard specification and this document, but the content referenced by those URIs MUST NOT have any URIs, and therefore MUST be enforced by the client to not follow those URI references or not render that content to the user if any URI are present in that specific URI linked content. Perhaps: In other words, the jCard can have URI references as defined in the jCard specification and this document, but the content referenced by those URIs MUST NOT have any URIs; therefore, the client MUST ensure that those URI references are not followed, and any URIs that are present in that specific URI-linked content are not rendered. --> 16) <!-- [rfced] It appears as though tokens appear in double quotes. Should the section title be updated to reflect "icon"? Original: 10.2. Usage of Multimedia Data in jCard or with Icon Perhaps: 10.2. Usage of Multimedia Data in jCard or with the "icon" Token --> 17) <!-- [rfced] Is it accurate to refer to the 'potential instances of the "tel" property', as opposed to 'instances of the "tel" property'? Original: It is important to note that any of the potential instances of the "tel" property should not be considered part of the authentication or verification part of STIR [RFC8224] or required to match the "orig" claim in the PASSporT [RFC8225]. Similarly, is "has the intent" correct in the following (instead of "provides" and "specifies")? Original: The "title" property has the intent of providing the position or job of the object the jCard represents. Reference [RFC6350], Section 6.6.1. The "role" property has the intent of providing the position or job of the object the jCard represents. Reference [RFC6350], Section 6.6.2. The "logo" property has the intent of specifying a graphic image of a logo associated with the object the jCard represents. Reference [RFC6350], Section 6.6.3. The "org" property has the intent of specifying the organizational name and units of the object the jCard represents. Reference [RFC6350], Section 6.6.4. The "version" property MUST be included and is intended to specify the version of the vCard specification used to format this vCard. --> 18) <!-- [rfced] For clarity, we suggest the update below. Please review and let us know if this acceptable. Original: The end client receiving a jCard with a "url" property MUST only display the URL and not automatically follow the URL or provide automatic preview of the URL, and generally provide good practices in making it clear to the user it is their choice to follow the URL in a browser context consistent with all of the common browser security and privacy practices available on most consumer OS environments. Perhaps: The end client receiving a jCard with a "url" property MUST only display the URL and not automatically follow the URL or provide an automatic preview of the URL. In addition, it MUST generally adhere to good practice to make it clear to the user that it is their choice whether to follow the URL in a browser context consistent with all of the common browser security and privacy practices available on most consumer OS environments. --> 19) <!-- [rfced] "since its existence" is awkward; may we update the text as follows? Current: The SIP framework, defined in [RFC3261] and the various extensions to SIP, which includes STIR [RFC8224] and rich call data [RFC9795], since its existence has provided mechanisms to assert information about the person or entity behind the call. Perhaps: The SIP framework, defined in [RFC3261] and the various extensions to SIP, which includes STIR [RFC8224] and rich call data [RFC9795], has always provided mechanisms to assert information about the person or entity behind the call. --> 20) <!-- [rfced] What does "weigh this responsibility" refer to? Is it the core security consideration, the risk of impersonation, or both? Original (earlier sentences included for context): It can also enable the ability for actors to impersonate a calling party they are not authorized to represent. The core security consideration that either explicitly or implicitly have been acknowledged with any of the SIP and STIR specifications is that there is a management and policy layer that validates the participants in the ecosystem and their use of a SIP network with telephone number identifiers and identity related information. The use of this specification should weigh this responsibility and make the appropriate considerations to validate the proper participation and use of these tools follow these larger security, impersonation prevention, and privacy considerations. Perhaps: Users should assess this [risk / core consideration / both the risk and core consideration] and make the appropriate adjustments to validate proper participation while following these larger security, impersonation prevention, and privacy considerations. --> 21) <!--[rfced] May this be rephrased for readability? If so, who should do the considering? Original: A network specific set of policies or best practices for the use and hosting of media content that is agreed to contain validated media resources that have been evaluated to not pose a security threat to the participants or the devices supported in the ecosystem should be considered. Perhaps: Network administrators should consider a network-specific set of policies or best practices for the use and hosting of media content that is agreed to contain validated media resources that have been evaluated to not pose a security threat to the participants or the devices supported in the ecosystem. --> 22) <!-- [rfced] Regarding [W3C-SRI], the original URL for this reference directed the reader to a W3C First Public Working Draft with a date of 22 April 2025. However, the original date provided for this reference was 23 June 2016, which matches that of the W3C Recommendation titled "Subresource Integrity" (https://www.w3.org/TR/2016/REC-SRI-20160623/). We have updated this reference to that. However, please let us know if you intended to point to the First Public Working Draft (https://www.w3.org/TR/2025/WD-sri-2-20250422/) or otherwise. Original: [W3C-SRI] W3C, "Subresource Integrity", 23 July 2016, <https://www.w3.org/TR/SRI/>. Current: [W3C-SRI] Akhawe, D., Ed., Braun, F., Ed., Marier, F., Ed., and J. Weinberger, Ed., "Subresource Integrity", W3C Recommendation, 23 June 2016, <https://www.w3.org/TR/2016/REC-SRI-20160623/>. --> 23) <!-- [rfced] Regarding [ITUJPEG]: This reference uses the date for the ISO/IEC Standard ISO/IEC 10918-5 (May 2013), but points to the ITU-T Recommendation which was published in May 2011 (https://www.itu.int/rec/T-REC-T.871-201105-I/en). We have updated this reference to use the date for the ITU-T Recommendation and added a URL pointing to that specification. Please let us know if you have any concerns. --> 24) <!-- [rfced] We have added a URL to the [ISOPNG] reference. Please let us know if you have any concerns. Current: [ISOPNG] ISO/IEC, "Information technology - Computer graphics and image processing - Portable Network Graphics (PNG), Functional specification", ISO/IEC 15948:2004, March 2004, <https://www.iso.org/standard/29581.html>. --> 25) <!-- [rfced] Note that we updated claim names to use double quotes to match the use in RFC-to-be 9575 <draft-ietf-stir-passport-rcd>. Please let us know if any updates are required. Throughout the text, the following terminology appears to be used inconsistently. Please review these occurrences and let us know if/how they may be made consistent. rich call data vs. Rich Call Data Also, would you like instances of "Rich Call Data" to be replaced with "RCD" throughout, or is it intentionally expanded in the instances that remain? --> 26) <!-- [rfced] Please review whether any of the notes in this document should be in the <aside> element. It is defined as "a container for content that is semantically less important or tangential to the content that surrounds it" (https://authors.ietf.org/en/rfcxml-vocabulary#aside). --> 27) <!-- [rfced] Please review the "Inclusive Language" portion of the online Style Guide <https://www.rfc-editor.org/styleguide/part2/#inclusive_language> and let us know if any changes are needed. Updates of this nature typically result in more precise language, which is helpful for readers. Note that our script did not flag any words in particular, but this should still be reviewed as a best practice. --> Thank you. RFC Editor/sg/ar On May 23, 2025, rfc-edi...@rfc-editor.org wrote: *****IMPORTANT***** Updated 2025/05/23 RFC Author(s): -------------- Instructions for Completing AUTH48 Your document has now entered AUTH48. Once it has been reviewed and approved by you and all coauthors, it will be published as an RFC. 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