GB2308282B - Differential work factor cryptography method and system - Google Patents
Differential work factor cryptography method and systemInfo
- Publication number
- GB2308282B GB2308282B GB9625925A GB9625925A GB2308282B GB 2308282 B GB2308282 B GB 2308282B GB 9625925 A GB9625925 A GB 9625925A GB 9625925 A GB9625925 A GB 9625925A GB 2308282 B GB2308282 B GB 2308282B
- Authority
- GB
- United Kingdom
- Prior art keywords
- work factor
- cryptography method
- differential work
- differential
- cryptography
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
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
- H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
- H04L9/0819—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s)
- H04L9/0825—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s) using asymmetric-key encryption or public key infrastructure [PKI], e.g. key signature or public key certificates
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K1/00—Secret communication
-
- 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
- H04L9/088—Usage controlling of secret information, e.g. techniques for restricting cryptographic keys to pre-authorized uses, different access levels, validity of crypto-period, different key- or password length, or different strong and weak cryptographic algorithms
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
- H04L2209/60—Digital content management, e.g. content distribution
- H04L2209/605—Copy protection
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US57322895A | 1995-12-15 | 1995-12-15 | |
US08/573,110 US5764772A (en) | 1995-12-15 | 1995-12-15 | Differential work factor cryptography method and system |
Publications (3)
Publication Number | Publication Date |
---|---|
GB9625925D0 GB9625925D0 (en) | 1997-01-29 |
GB2308282A GB2308282A (en) | 1997-06-18 |
GB2308282B true GB2308282B (en) | 2000-04-12 |
Family
ID=27076032
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9625925A Expired - Fee Related GB2308282B (en) | 1995-12-15 | 1996-12-13 | Differential work factor cryptography method and system |
Country Status (5)
Country | Link |
---|---|
JP (1) | JPH1028114A (en) |
KR (1) | KR100445737B1 (en) |
DE (1) | DE19652295B4 (en) |
FR (1) | FR2742617B1 (en) |
GB (1) | GB2308282B (en) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2329096A (en) * | 1997-08-29 | 1999-03-10 | Ncipher Limited | Creating sub-keys from hashed cryptographic master key |
US6578143B1 (en) * | 1998-12-18 | 2003-06-10 | Qualcomm Incorporated | Method for negotiating weakened keys in encryption systems |
US6636968B1 (en) | 1999-03-25 | 2003-10-21 | Koninklijke Philips Electronics N.V. | Multi-node encryption and key delivery |
AU4146000A (en) * | 1999-05-10 | 2000-11-21 | Toshio Doi | Remedies for glomerulosclerosis |
GB2390270A (en) * | 2002-06-27 | 2003-12-31 | Ericsson Telefon Ab L M | Escrowing with an authority only part of the information required to reconstruct a decryption key |
DE102005013909A1 (en) * | 2005-03-24 | 2006-09-28 | Siemens Ag | Device and method for key reduction |
US7873166B2 (en) | 2005-09-13 | 2011-01-18 | Avaya Inc. | Method for undetectably impeding key strength of encryption usage for products exported outside the U.S |
US8345871B2 (en) * | 2007-03-15 | 2013-01-01 | Palo Alto Research Center Incorporated | Fast authentication over slow channels |
US8199917B2 (en) * | 2008-10-29 | 2012-06-12 | International Business Machines Corporation | SID management for access to encrypted drives |
CN106549920B (en) * | 2015-09-21 | 2021-06-01 | 华为终端有限公司 | Login information input method, login information storage method and related device |
FR3058604B1 (en) * | 2016-11-09 | 2022-12-16 | Sigfox | METHOD AND DEVICE FOR TRANSMITTING ENCRYPTED DATA, METHOD AND DEVICE FOR DATA EXTRACTION |
KR102357698B1 (en) * | 2020-02-24 | 2022-02-14 | 황순영 | Private key management method using partial hash value |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5315658A (en) * | 1992-04-20 | 1994-05-24 | Silvio Micali | Fair cryptosystems and methods of use |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5323464A (en) * | 1992-10-16 | 1994-06-21 | International Business Machines Corporation | Commercial data masking |
US5557765A (en) * | 1994-08-11 | 1996-09-17 | Trusted Information Systems, Inc. | System and method for data recovery |
-
1996
- 1996-12-13 GB GB9625925A patent/GB2308282B/en not_active Expired - Fee Related
- 1996-12-14 KR KR1019960065695A patent/KR100445737B1/en not_active IP Right Cessation
- 1996-12-16 DE DE19652295A patent/DE19652295B4/en not_active Expired - Fee Related
- 1996-12-16 JP JP8352585A patent/JPH1028114A/en active Pending
- 1996-12-16 FR FR9615449A patent/FR2742617B1/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5315658A (en) * | 1992-04-20 | 1994-05-24 | Silvio Micali | Fair cryptosystems and methods of use |
US5315658B1 (en) * | 1992-04-20 | 1995-09-12 | Silvio Micali | Fair cryptosystems and methods of use |
Also Published As
Publication number | Publication date |
---|---|
GB2308282A (en) | 1997-06-18 |
KR970056124A (en) | 1997-07-31 |
DE19652295A1 (en) | 1997-06-19 |
KR100445737B1 (en) | 2004-11-03 |
FR2742617A1 (en) | 1997-06-20 |
JPH1028114A (en) | 1998-01-27 |
DE19652295B4 (en) | 2009-05-14 |
GB9625925D0 (en) | 1997-01-29 |
FR2742617B1 (en) | 2000-08-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
746 | Register noted 'licences of right' (sect. 46/1977) |
Effective date: 20071127 |
|
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20111213 |