Qualcomm Incorporated

Matthew W Hohfeld

Gregory Gordon Rose

Alexander Gantman

Oliver Michaelis

Laurence Geoffrey Lundblade

Michael William Paddon

Ricardo Jorge Lopez

Aram Perez

Embodiments describe a system and/or method for multiple party digital signatures. According to a first aspect a method comprises establishing a first validity range for a first key, establishing a first validity range for at least a second key, and determining if the validity range of the first key overlaps the first validity range of the at least a second key. A certificate is signed with the first validity range of the first key and the first validity range of the at least a second key if the validity ranges overlap. According to another embodiment, signage of the certificate is refused if the first validity range of the first key does not overlap with the first validity range of the at least a second key.

Multisigning&#x2014;a protocol for robust multiple party digital signatures

Growing community of inventors

San Diego, CA, United States of America

Matthew W Hohfeld