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1. (WO2019007783) METHOD AND DEVICE FOR PRODUCING A CRYPTOGRAPHIC TIMESTAMP FOR A DIGITAL DOCUMENT ON A MAJORITY BASIS
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Pub. No.:
WO/2019/007783
International Application No.:
PCT/EP2018/067284
Publication Date:
10.01.2019
International Filing Date:
27.06.2018
IPC:
H04L 9/32
(2006.01) ,
H04L 9/12
(2006.01)
H
ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
L
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
9
Arrangements for secret or secure communication
32
including means for verifying the identity or authority of a user of the system
H
ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
L
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
9
Arrangements for secret or secure communication
12
Transmitting and receiving encryption devices synchronised or initially set up in a particular manner
Applicants:
SIEMENS AKTIENGESELLSCHAFT
[DE/DE]; Werner-von-Siemens-Straße 1 80333 München, DE
Inventors:
ASCHAUER, Hans
; DE
FRIES, Steffen
; DE
MERLI, Dominik
; DE
Priority Data:
17179823.4
05.07.2017
EP
Title
(EN)
METHOD AND DEVICE FOR PRODUCING A CRYPTOGRAPHIC TIMESTAMP FOR A DIGITAL DOCUMENT ON A MAJORITY BASIS
(FR)
PROCÉDÉ ET DISPOSITIF POUR GÉNÉRER UNE ESTAMPILLE TEMPORELLE CRYPTOGRAPHIQUE POUR UN DOCUMENT NUMÉRIQUE SUR LA BASE DE LA MAJORITÉ
(DE)
VERFAHREN UND VORRICHTUNG ZUM ERZEUGEN EINES KRYPTOGRAPHISCHEN ZEITSTEMPELS FÜR EIN DIGITALES DOKUMENT AUF MEHRHEITSBASIS
Abstract:
(EN)
The invention relates to a method for producing a cryptographic timestamp (3) for a digital document (2) using multiple time servers (80-83). In the method, a nonce value (20) is produced (S1) and a current hash value (30) is formed from the nonce value (20) and the digital document (2). Then, a time server (80-83) is repeatedly selected (S2), the current hash value (30-32) is transmitted to the selected time server (80-83), a response (40-42) comprising a digital signature (50-52) of the current hash value (30-32) and a time indication (50-52) is received by the selected time server (80-82), and an additional hash value (31-32) is determined from the received response (40-42) and used (31-32) as the current hash value. The cryptographic timestamp (3) for the digital document (2) is formed (S3) from the nonce value (20) and the multiple received responses (40-42). The method produces a tamperproof timestamp (3) on a majority basis and is suitable for dating and protocolling in the field of automation and IoT.
(FR)
L'invention concerne un procédé pour générer une estampille temporelle (3) cryptographique pour un document numérique (2) au moyen de plusieurs serveurs temporels (80-83). Ce procédé consiste à générer (S1) une valeur nonce (20) et à former une valeur de hachage (30) effective à partir de cette valeur nonce (20) et du document numérique (2). Puis (S2), à plusieurs reprises, un serveur temporel (80-83) est sélectionné, la valeur de hachage (30-32) effective est transmise au serveur temporel (80-83) sélectionné, une réponse (40-42) comportant une signature numérique (50-52) de la valeur de hachage (30-32) effective et une indication temporelle (50-52) est reçue par le serveur temporel (80-82) sélectionné, et une valeur de hachage (31-32) supplémentaire est déterminée à partir de la réponse (40-42) reçue et utilisée en tant que valeur de hachage (31-32) effective. L'estampille temporelle (3) cryptographique pour le document numérique (2) est formée (S3) à partir de la valeur nonce (20) et de la pluralité de réponses (40-42) reçues. Le procédé selon l'invention permet de générer une estampille temporelle (3) à l'épreuve des manœuvres frauduleuses sur la base de la majorité et est conçu pour l'horodatage et la journalisation dans le domaine de l'automatisation et de l'IdO.
(DE)
Es wird ein Verfahren zum Erzeugen eines kryptographischen Zeitstempels (3) für ein digitales Dokument (2) unter Verwendung mehrerer Zeitserver (80-83) vorgeschlagen. Bei dem Verfahren wird ein Noncewert (20) erzeugt (S1) und ein aktueller Hashwert (30) von dem Noncewert (20) und dem digitalen Dokument (2) gebildet. Sodann wird (S2) wiederholt einer der Zeitserver (80-83) ausgewählt, der aktuelle Hashwert (30-32) an den ausgewählten Seitserver (80-83) übermittelt, von dem ausgewählten Zeitserver (80-82) eine Antwort (40-42) empfangen, die eine digitale Signatur (50-52) des aktuellen Hashwerts (30-32) und eine Zeitangabe (50-52) umfasst, und ein weiterer Hashwert (31-32) aus der empfangenen Antwort (40-42) bestimmt und als der aktuelle Hashwert verwendet (31-32). Der kryptographische Zeitstempel (3) für das digitale Dokument (2) wird aus dem Noncewert (20) und den mehreren empfangenen Antworten (40-42) gebildet (S3). Das Verfahren erzeugt einen manipulationssicherer Zeitstempel (3) auf Mehrheitsbasis und eignet sich zur Datierung und Protokollierung im Bereich Automatisierung und IoT.
Designated States:
AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language:
German (
DE
)
Filing Language:
German (
DE
)