Re: [lamps] On the need for standardization of software-based interoperable private keys
Daniel Kahn Gillmor <dkg@fifthhorseman.net> Thu, 05 August 2021 18:34 UTC
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From: Daniel Kahn Gillmor <dkg@fifthhorseman.net>
To: LAMPS <spasm@ietf.org>
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Autocrypt: addr=dkg@fifthhorseman.net; prefer-encrypt=mutual; keydata= mDMEX+i03xYJKwYBBAHaRw8BAQdACA4xvL/xI5dHedcnkfViyq84doe8zFRid9jW7CC9XBiI0QQf FgoAgwWCX+i03wWJBZ+mAAMLCQcJEOCS6zpcoQ26RxQAAAAAAB4AIHNhbHRAbm90YXRpb25zLnNl cXVvaWEtcGdwLm9yZ/tr8E9NA10HvcAVlSxnox6z62KXCInWjZaiBIlgX6O5AxUKCAKbAQIeARYh BMKfigwB81402BaqXOCS6zpcoQ26AADZHQD/Zx9nc3N2kj13AUsKMr/7zekBtgfSIGB3hRCU74Su G44A/34Yp6IAkndewLxb1WdRSokycnaCVyrk0nb4imeAYyoPtBc8ZGtnQGZpZnRoaG9yc2VtYW4u bmV0PojRBBMWCgCDBYJf6LTfBYkFn6YAAwsJBwkQ4JLrOlyhDbpHFAAAAAAAHgAgc2FsdEBub3Rh dGlvbnMuc2VxdW9pYS1wZ3Aub3JnL0Gwxvypz2tu1IPG+yu1zPjkiZwpscsitwrVvzN3bbADFQoI ApsBAh4BFiEEwp+KDAHzXjTYFqpc4JLrOlyhDboAAPkXAP0Z29z7jW+YzLzPTQML4EQLMbkHOfU4 +s+ki81Czt0WqgD/SJ8RyrqDCtEP8+E4ZSR01ysKqh+MUAsTaJlzZjehiQ24MwRf6LTfFgkrBgEE AdpHDwEBB0DkKHOW2kmqfAK461+acQ49gc2Z6VoXMChRqobGP0ubb4kBiAQYFgoBOgWCX+i03wWJ BZ+mAAkQ4JLrOlyhDbpHFAAAAAAAHgAgc2FsdEBub3RhdGlvbnMuc2VxdW9pYS1wZ3Aub3Jnfvo+ nHoxDwaLaJD8XZuXiaqBNZtIGXIypF1udBBRoc0CmwICHgG+oAQZFgoAbwWCX+i03wkQPp1xc3He VlxHFAAAAAAAHgAgc2FsdEBub3RhdGlvbnMuc2VxdW9pYS1wZ3Aub3JnaheiqE7Pfi3Atb3GGTw+ jFcBGOaobgzEJrhEuFpXREEWIQQttUkcnfDcj0MoY88+nXFzcd5WXAAAvrsBAIJ5sBg8Udocv25N stN/zWOiYpnjjvOjVMLH4fV3pWE1AP9T6hzHz7hRnAA8d01vqoxOlQ3O6cb/kFYAjqx3oMXSBhYh BMKfigwB81402BaqXOCS6zpcoQ26AADX7gD/b83VObe14xrNP8xcltRrBZF5OE1rQSPkMNy+eWpk eCwA/1hxiS8ZxL5/elNjXiWuHXEvUGnRoVj745Vl48sZPVYMuDgEX+i03xIKKwYBBAGXVQEFAQEH QIGex1WZbH6xhUBve5mblScGYU+Y8QJOomXH+rr5tMsMAwEICYjJBBgWCgB7BYJf6LTfBYkFn6YA CRDgkus6XKENukcUAAAAAAAeACBzYWx0QG5vdGF0aW9ucy5zZXF1b2lhLXBncC5vcmcEAx9vTD3b J0SXkhvcRcCr6uIDJwic3KFKxkH1m4QW0QKbDAIeARYhBMKfigwB81402BaqXOCS6zpcoQ26AAAX mwD8CWmukxwskU82RZLMk5fm1wCgMB5z8dA50KLw3rgsCykBAKg1w/Y7XpBS3SlXEegIg1K1e6dR fRxL7Z37WZXoH8AH
Date: Thu, 05 Aug 2021 13:41:02 -0400
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Subject: Re: [lamps] On the need for standardization of software-based interoperable private keys
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On Thu 2021-08-05 12:43:22 -0400, Ryan Sleevi wrote: > we can do better, by reducing the amount of key slinging that is > happening, and being comfortable with the existence of multiple > keys. Protocols such as WebAuthN are designed around this concept, as > are the hardware tokens implementing it; the notion of many keys (a > key for origin/application), rather than trying to have One Key to > Rule Them All. Note that multiple authentication/signing private keys is significantly easier to manage than multiple message encryption keys. WebAuthN works in a different space than encrypted e-mail. Having an e-mail message delivered that is readable in only one of your MUAs, when both MUAs are capable of reading *some* of your encrypted messages, is a terrible UX failure. Deciding to fix that by fixing all the senders in the world to encrypt to all the valid encryption-capable certs they have for a recipient (and ensuring that they actually *do* have all the certificates for a given peer) is a complex, long-term, systems-level problem to solve. In the meantime, sharing a decryption-capable private key between MUAs is a one-time, one-shot fix that the account owner can perform on their own (or could, if the tooling were actually functional), and even works to unlock old messages that had already been sent before the new MUA was brought online. Signing (of which authentication is a subset) is a different problem than store-and-forward encryption to a potentially offline peer. --dkg
- [lamps] draft-ietf-lamps-samples: PKCS12 expertis… Daniel Kahn Gillmor
- Re: [lamps] draft-ietf-lamps-samples: PKCS12 expe… Ryan Sleevi
- Re: [lamps] draft-ietf-lamps-samples: PKCS12 expe… Russ Housley
- Re: [lamps] draft-ietf-lamps-samples: PKCS12 expe… Daniel Kahn Gillmor
- Re: [lamps] draft-ietf-lamps-samples: PKCS12 expe… Ryan Sleevi
- Re: [lamps] draft-ietf-lamps-samples: PKCS12 expe… Salz, Rich
- Re: [lamps] draft-ietf-lamps-samples: PKCS12 expe… Russ Housley
- Re: [lamps] draft-ietf-lamps-samples: PKCS12 expe… Blumenthal, Uri - 0553 - MITLL
- Re: [lamps] draft-ietf-lamps-samples: PKCS12 expe… Michael Richardson
- Re: [lamps] draft-ietf-lamps-samples: PKCS12 expe… Ryan Sleevi
- Re: [lamps] draft-ietf-lamps-samples: PKCS12 expe… Deb Cooley
- Re: [lamps] draft-ietf-lamps-samples: PKCS12 expe… Daniel Kahn Gillmor
- Re: [lamps] draft-ietf-lamps-samples: PKCS12 expe… Tomas Gustavsson
- Re: [lamps] draft-ietf-lamps-samples: PKCS12 expe… David Woodhouse
- Re: [lamps] draft-ietf-lamps-samples: PKCS12 expe… Dmitry Belyavsky
- Re: [lamps] draft-ietf-lamps-samples: PKCS12 expe… Michael Richardson
- Re: [lamps] draft-ietf-lamps-samples: PKCS12 expe… Daniel Kahn Gillmor
- Re: [lamps] draft-ietf-lamps-samples: PKCS12 expe… Daniel Kahn Gillmor
- Re: [lamps] draft-ietf-lamps-samples: PKCS12 expe… Ryan Sleevi
- Re: [lamps] draft-ietf-lamps-samples: PKCS12 expe… Michael Richardson
- Re: [lamps] draft-ietf-lamps-samples: PKCS12 expe… Blumenthal, Uri - 0553 - MITLL
- Re: [lamps] draft-ietf-lamps-samples: PKCS12 expe… Daniel Kahn Gillmor
- [lamps] On the need for standardization of softwa… Daniel Kahn Gillmor
- Re: [lamps] On the need for standardization of so… Stephen Farrell
- Re: [lamps] On the need for standardization of so… Tomas Gustavsson
- Re: [lamps] draft-ietf-lamps-samples: PKCS12 expe… Dmitry Belyavsky
- Re: [lamps] On the need for standardization of so… Carl Wallace
- Re: [lamps] On the need for standardization of so… Dmitry Belyavsky
- Re: [lamps] On the need for standardization of so… Carl Wallace
- Re: [lamps] On the need for standardization of so… Blumenthal, Uri - 0553 - MITLL
- Re: [lamps] On the need for standardization of so… Eliot Lear
- Re: [lamps] draft-ietf-lamps-samples: PKCS12 expe… Ryan Sleevi
- Re: [lamps] On the need for standardization of so… Blumenthal, Uri - 0553 - MITLL
- Re: [lamps] On the need for standardization of so… Michael Richardson
- Re: [lamps] On the need for standardization of so… Michael Richardson
- Re: [lamps] On the need for standardization of so… Michael Richardson
- Re: [lamps] On the need for standardization of so… Carl Wallace
- Re: [lamps] On the need for standardization of so… Salz, Rich
- Re: [lamps] On the need for standardization of so… Blumenthal, Uri - 0553 - MITLL
- Re: [lamps] On the need for standardization of so… Michael Richardson
- Re: [lamps] On the need for standardization of so… Michael Richardson
- Re: [lamps] On the need for standardization of so… Bernie Hoeneisen
- Re: [lamps] On the need for standardization of so… Carl Wallace
- Re: [lamps] On the need for standardization of so… Ryan Sleevi
- Re: [lamps] On the need for standardization of so… Michael Richardson
- Re: [lamps] On the need for standardization of so… Daniel Kahn Gillmor
- Re: [lamps] On the need for standardization of so… Daniel Kahn Gillmor
- Re: [lamps] On the need for standardization of so… Daniel Kahn Gillmor
- Re: [lamps] draft-ietf-lamps-samples: PKCS12 expe… Daniel Kahn Gillmor
- [lamps] Transferring cryptographic information in… Daniel Kahn Gillmor
- Re: [lamps] draft-ietf-lamps-samples: PKCS12 expe… Dmitry Belyavsky
- Re: [lamps] On the need for standardization of so… David Woodhouse
- Re: [lamps] On the need for standardization of so… David Woodhouse
- Re: [lamps] On the need for standardization of so… Stephen Farrell
- Re: [lamps] On the need for standardization of so… Ryan Sleevi
- Re: [lamps] On the need for standardization of so… Michael Richardson
- Re: [lamps] Transferring cryptographic informatio… Michael Richardson
- Re: [lamps] On the need for standardization of so… Dmitry Belyavsky
- Re: [lamps] On the need for standardization of so… Michael Richardson
- Re: [lamps] draft-ietf-lamps-samples: PKCS12 expe… Daniel Kahn Gillmor
- Re: [lamps] draft-ietf-lamps-samples: PKCS12 expe… Blumenthal, Uri - 0553 - MITLL
- Re: [lamps] draft-ietf-lamps-samples: PKCS12 expe… Daniel Kahn Gillmor
- Re: [lamps] draft-ietf-lamps-samples: PKCS12 expe… Ryan Sleevi
- Re: [lamps] On the need for standardization of so… Jonathan Hammell
- Re: [lamps] On the need for standardization of so… Russ Housley
- Re: [lamps] draft-ietf-lamps-samples: PKCS12 expe… Russ Housley
- Re: [lamps] draft-ietf-lamps-samples: PKCS12 expe… Daniel Kahn Gillmor
- Re: [lamps] On the need for standardization of so… Daniel Kahn Gillmor
- Re: [lamps] On the need for standardization of so… Russ Housley
- Re: [lamps] On the need for standardization of so… Deb Cooley
- Re: [lamps] On the need for standardization of so… Carl Wallace
- Re: [lamps] On the need for standardization of so… Deb Cooley
- Re: [lamps] On the need for standardization of so… Russ Housley
- Re: [lamps] On the need for standardization of so… Dmitry Belyavsky
- [lamps] advertising multiple S/MIME encryption-ca… Daniel Kahn Gillmor