OID value: 1.2.840.1135184.108.40.206.2.12
An identifier of an attribute found in signed-attribute collections of a Cryptographic Message Syntax "Signed Data" object. The attribute value is a SigningCertificate sequence, defined in RFC 2634, "Enhanced Security Services for S/MIME". The attribute allows a message signer provide a signed version of the certificate identifier to be used for signature verification. This thwarts some certificate substitution attacks.
URL for further info: http://tools.ietf.org/html/rfc2634#section-5.4
See also the OID Repository website reference for 1.2.840.1135220.127.116.11.2.12