diff --git a/middle.mkd b/middle.mkd index f09d85f..373aca2 100644 --- a/middle.mkd +++ b/middle.mkd @@ -1058,6 +1058,7 @@ The value of the subpacket type octet may be: 32 Embedded Signature 33 Issuer Fingerprint 34 Preferred AEAD Algorithms + 35 Intended Recipient Fingerprint 100 to 110 Private or experimental An implementation SHOULD ignore any subpacket of a type that it does @@ -1662,6 +1663,19 @@ signature, the key ID of the Issuer subpacket MUST match the low Note that the length N of the fingerprint for a version 4 key is 20 octets; for a version 5 key N is 32. +#### Intended Recipient Fingerprint + +(1 octet key version number, N octets of fingerprint) + +The OpenPGP Key fingerprint of the intended recipient primary key. If +one or more subpackets of this type are included in a signature, it +SHOULD be considered valid only in an encrypted context, where the key +it was encrypted to is one of the indicated primary keys, or one of +their subkeys. This can be used to prevent forwarding a signature +outside of its intended, encrypted context. + +Note that the length N of the fingerprint for a version 4 key is 20 +octets; for a version 5 key N is 32. ### {5.2.4} Computing Signatures