Implementing digital signatures for data streams and data archives
Abstract
Methods, apparatuses and products are provided for establishing and verifying the authenticity of data within one or more data files. In accordance with one aspect of the present invention, a method for verifying the authenticity of data involves providing at least one data file which includes an identifier and a signature file which includes the identifier for the data file as well as a digital signature. The digital signature is then verified using a computer system, and the identifier in the data file is compared with the identifier in the signature file using the computer system. In one embodiment, the identifier for the data file includes at least one certificate authority, site certificate, software publisher identifier, or a site name, and verifying the authenticity of data involves setting a security level for at least one of the certificate authority, said site certificate, said software publisher identifier, and said site name.
Term
Term ended
Projected expiry passed 24 November 2017, 8.8 years ago.
- Priority
- Filed
- Published
- Projected expiry
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2 sheets
Sheet 1 Sheet 2
Every citation, both waysCites: the store holds 1 of 2
| Document | Relation | Office | Category | Cited during | Relevant claims |
|---|---|---|---|---|---|
| US5412717A | Cites | United States of America | A | Search report | 1-21 |
| P. ZIMMERMANN: "PGP Message Exchange Formats", RFC1991, August 1996 (1996-08-01), XP002206142, Retrieved from the Internet <URL:http://www.ietf.org/rfc/rfc1991.txt> [retrieved on 20020715] | Non-patent | – | – | Search report | – |
| MICROSOFT AUTHENTICODE TECHNOLOGY, October 1996 (1996-10-01), XP002205348, Retrieved from the Internet <URL:http://web.archive.org/web/20010413161041/msdn.microsoft.com/workshop/security/authcode/authwp.asp> [retrieved on 20020708] | Non-patent | – | – | Search report | – |
| CONFERENCE JAVAONE 1996, 29 May 1996 (1996-05-29) - 31 May 1996 (1996-05-31), San Francisco, XP002205349, Retrieved from the Internet <URL:http://java.sun.com/javaone/javaone96/pres/Crypto.pdf> [retrieved on 20020708] | Non-patent | – | – | Search report | – |
12 members in 5 offices
Priority claims8
| Document | Office | Kind | Date |
|---|---|---|---|
| 753716 | United States of America | – | |
| 75371696 | United States of America | A | |
| 780817 | United States of America | – | |
| 78081797 | United States of America | A | |
| 753716 | – | – | – |
| 780817 | – | – | – |
| US19960753716 | – | – | – |
| US19970780817 | – | – | – |
Members12
| Document | Office | Kind | |
|---|---|---|---|
| EP0845733A2 | European Patent Office (EPO) | A2 | |
| KR19980042805A | Republic of Korea | A | |
| JPH10326078A | Japan | A | |
| US5958051A | United States of America | A | |
| US6021491A | United States of America | A | |
| EP0845733A3This record | European Patent Office (EPO) | A3 | |
| KR100338397B1 | Republic of Korea | B1 | |
| JP2003218859A | Japan | A | |
| EP0845733B1 | European Patent Office (EPO) | B1 | |
| DE69727198D1 | Germany | D1 | |
| DE69727198T2 | Germany | T2 | |
| JP4359427B2 | Japan | B2 |
28 legal events, as 4 offices reported them to INPADOC
Over the term
Point at a mark for the eventEvents
| Event | Code | Office | |
|---|---|---|---|
| Expiry of rightR071 | R071 | DE | |
| Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP | PGFP | EP | |
| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | EP | |
| Gb: european patent ceased through non-payment of renewal feeCeasedGBPC | GBPC | EP | |
| Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP | PGFP | EP | |
| Notification of lapseLapsedST | ST | FR | |
| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | EP | |
| No opposition filedOpposition26N | 26N | EP | |
| No opposition filed within time limitOppositionORIGINAL CODE: 0009261PLBE | PLBE | EP | |
| Information on the status of an ep patent application or granted ep patentGrantedSTATUS: NO OPPOSITION FILED WITHIN TIME LIMITSTAA | STAA | EP | |
| Fr: translation filedET | ET | EP | |
| Corresponds to:REF | REF | EP | |
| Designated contracting statesAK | AK | EP | |
| European patent grantedGrantedFG4D | FG4D | GB | |
| Information on inventor provided before grant (corrected)RIN1 | RIN1 | EP | |
| Information on inventor provided before grant (corrected)RIN1 | RIN1 | EP | |
| Information on inventor provided before grant (corrected)RIN1 | RIN1 | EP | |
| (expected) grantORIGINAL CODE: 0009210GRAA | GRAA | EP | |
| Grant fee paidORIGINAL CODE: EPIDOSNIGR3GRAS | GRAS | EP | |
| Designation fees paidAKX | AKX | EP | |
| Despatch of communication of intention to grant a patentORIGINAL CODE: EPIDOS IGRAGRAH | GRAH | EP | |
| Request for examination filed17P | 17P | EP | |
| Designated contracting statesAK | AK | EP | |
| Request for extension of the european patentAL;LT;LV;MK;RO;SIAX | AX | EP | |
| Search report despatchedORIGINAL CODE: 0009013PUAL | PUAL | EP | |
| Designated contracting statesAK | AK | EP | |
| Request for extension of the european patentAL;LT;LV;MK;RO;SIAX | AX | EP | |
| Public reference made under article 153(3) epc to a published international application that has entered the european phaseORIGINAL CODE: 0009012PUAI | PUAI | EP |
Numbers
- Publication
- 0845733
- Publication, DOCDB
- 0845733
- Publication, EPODOC
- EP0845733
- Application
- 97309460
- Application, DOCDB
- 97309460
- Application, EPODOC
- EP19970309460
Titles3
- German
- Durchführen digitaler Unterschriften für Datenströme und Archive
- English
- Implementing digital signatures for data streams and data archives
- French
- Mise en oeuvre de signatures numériques de flux de données et d'archives
Classification
- CPC, 4
- G06F21/64
- G06F21/51
- G06F21/554
- G06F21/604
- IPC, 4
- H04L9 32
- G06F1 00
- G06F21 00
- G09C1 00
Designated states2
- Contracting states, 1
- Sweden
- Extension states, 1
- Slovenia