WO1998047260A3 - Publicly verifiable key recovery - Google Patents

Publicly verifiable key recovery Download PDF

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Publication number
WO1998047260A3
WO1998047260A3 PCT/US1998/006957 US9806957W WO9847260A3 WO 1998047260 A3 WO1998047260 A3 WO 1998047260A3 US 9806957 W US9806957 W US 9806957W WO 9847260 A3 WO9847260 A3 WO 9847260A3
Authority
WO
WIPO (PCT)
Prior art keywords
information
recovery
session key
verification
key recovery
Prior art date
Application number
PCT/US1998/006957
Other languages
French (fr)
Other versions
WO1998047260A9 (en
WO1998047260A2 (en
Inventor
David A Mcgrew
David W Carman
Original Assignee
Trusted Information Systems In
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US09/056,682 external-priority patent/US6249585B1/en
Application filed by Trusted Information Systems In filed Critical Trusted Information Systems In
Priority to AU87559/98A priority Critical patent/AU8755998A/en
Publication of WO1998047260A2 publication Critical patent/WO1998047260A2/en
Publication of WO1998047260A3 publication Critical patent/WO1998047260A3/en
Publication of WO1998047260A9 publication Critical patent/WO1998047260A9/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0894—Escrow, recovery or storing of secret information, e.g. secret key escrow or cryptographic key storage

Abstract

The present invention is a system and method for publicly verifying that a session key determined according to a Diffie-Hellman key exchange can be recovered from information associated with a communication encrypted with the session key. More particularly, the present invention provides recovery information and verification information with the encrypted communication. A recovery agent is able to recover the session key using the recovery information. A verifier, using the verification information, is able to verify that the session key can, in fact, be recovered from the recovery information. Neither the recovery information nor the verification information alone reveal any secret or private information. Furthermore, only the recovery agent is able to recover the session key, and he does so without revealing any other private information. Thus, the verification can be performed by any member of the public.
PCT/US1998/006957 1997-04-11 1998-04-10 Publicly verifiable key recovery WO1998047260A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU87559/98A AU8755998A (en) 1997-04-11 1998-04-10 Publicly verifiable key recovery

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US4376697P 1997-04-11 1997-04-11
US60/043,766 1997-04-11
US09/056,682 1998-04-08
US09/056,682 US6249585B1 (en) 1998-04-08 1998-04-08 Publicly verifiable key recovery

Publications (3)

Publication Number Publication Date
WO1998047260A2 WO1998047260A2 (en) 1998-10-22
WO1998047260A3 true WO1998047260A3 (en) 1999-03-18
WO1998047260A9 WO1998047260A9 (en) 2001-06-14

Family

ID=26720798

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1998/006957 WO1998047260A2 (en) 1997-04-11 1998-04-10 Publicly verifiable key recovery

Country Status (1)

Country Link
WO (1) WO1998047260A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19946127A1 (en) * 1999-09-20 2001-04-12 Deutsche Telekom Ag Method for decrypting documents encrypted with a hybrid encryption method after loss of the private cryptographic key
US8393001B1 (en) 2002-07-26 2013-03-05 Mcafee, Inc. Secure signature server system and associated method
US9106411B2 (en) * 2012-09-30 2015-08-11 Apple Inc. Secure escrow service

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996005673A1 (en) * 1994-08-11 1996-02-22 Trusted Information Systems, Inc. System and method for key escrow and data escrow encryption
US5557346A (en) * 1994-08-11 1996-09-17 Trusted Information Systems, Inc. System and method for key escrow encryption

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996005673A1 (en) * 1994-08-11 1996-02-22 Trusted Information Systems, Inc. System and method for key escrow and data escrow encryption
US5557346A (en) * 1994-08-11 1996-09-17 Trusted Information Systems, Inc. System and method for key escrow encryption

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
BETH ET AL.: "Towards acceptable key escrow systems", 2ND ACM CONFERENCE ON COMPUTER AND COMMUNICATIONS SECURITY, 2 November 1994 (1994-11-02), FAIRFAX (US), pages 51 - 58, XP000561595 *

Also Published As

Publication number Publication date
WO1998047260A9 (en) 2001-06-14
WO1998047260A2 (en) 1998-10-22

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