Back to results
US 9,806,890 B2Granted
Attribute-based digital signature system
AssigneeKoninklijke Philips N.V.
InventorsLuan Ibraimi, Muhammad Asim, Milan Petkovic
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeKoninklijke Philips N.V.
InventorsLuan Ibraimi, Muhammad Asim, Milan Petkovic
Estimating the term…
An attribute-based digital signature system comprises a signature generation unit (1) for signing a message (m) by generating a signature (σ) based on a user secret key (SK) associated with a set of user attributes, wherein the signature generation unit (1) is arranged for combining the user secret key (SK) with revocation data (R) to form at least part of the signature (σ), wherein the revocation data (R) complements respective ones of a plurality of valid user secret keys and wherein the revocation data (R) prevents a revoked user secret key (SK) from being used to validly sign a message (m) with the set of user attributes. The system further comprises a revocation unit (2) for selectively removing at least part of the signing capability of a to-be-revoked user secret key (SK), by generating updated revocation data (R), wherein the updated revocation data (R) is based on at least part of the to-be-revoked user secret key (SK). A plurality of attribute authorities 301 may independently issue cryptographic keys.
An attribute-based digital signature system, comprising:
A method of attribute-based digital signature processing, comprising:
A non-transitory computer readable medium that includes a program that, when executed by a processor, causes the processor to:
Dependencies are inferred from the claim text.