- What is digital timestamping? (RSA FAQ, 7.11)
- What is a digital time-stamping service? (Verisign Digital ID Introduction)
- Time-Date Stamping (Collection @pkilaw.com)
- Surety Technologies
![[Cool]](http://www.cs.ut.ee/~lipmaa/gifs/cool.gif)
- Cuculus Project (Estonian project)
- Digital Time-Stamping and the Evaluation of Security Primitives (KU Leuven)
- TIMESEC (Digital Time-Stamping and the Evaluation of Security Primitives (Belgian Project))
- Math RiZK (www.timestamping.com)
- PKITS Public Key Infrastructure with Time-Stamping Authority
- CITA
- IdentiScape (Stanford)
- Authentication/Notary Working Group, Japan (22.11.01)
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Commercial
- Surety
- Document Authentication Systems, Inc.
- E-Timestamp (a service of the DigiStamp Company)
- FirstUse.Com
- Timeproof (A unit of MAZ Hamburg GmbH)
- TimeStamp.Com
- VeriSign Timestamping Service
- eVeritas (Spain)
- GuardTime (09.10.07)
- Datum Trusted Time (Finland)
- AuthentiDate
- Aloha
- Free
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Experimental and Pilot projects
- Servicio de Sellado Digital de Tiempo (UPM.ES)
- SecTime
- Ewiges Logfile (in German)
- The Internet TS Service (MIT, Jeffrey Schiller)
- Time Stamp Service - Help (Ferdinando Ricchiuti)
- Demonstration Service of French postal office
- RFC Experimental TSS (Com-And)
- Not existing anymore? (as of 24.07.00)
- Time-Stamping Pilot Project (Cybernetica)
- OpenTSA
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Papers
- Cleaning up a mess on the web: a comparison of federal and state digital signature laws (Julian Epstein, Journal of Legilsation and Public Policy, 2002)
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Estonia
- Estonian Digital Signature Law (in Estonian)
- English Translation
(.rtf format) - Cuculus Project
(A background project for the law)
- [scholar]
- English Translation
- Estonian Digital Signature Law (in Estonian)
- Digital document time-stamping with catenate certificate (US-patent 5136646)
- Method for secure timestamping of digital documents (US patent 5136647)
- Method of extending the validity of a cryptographic certificate (US patent 5373561)
- Method for secure timestamping of digital documents (US patent RE34954)
- System and method for electronic transmission, storage and retrieval of authenticated documents
- :Digital document authentication system:U.S. Patent No. 5,781,629, issued July 14, 1998:15.05.99
- Relative logarithmic time stamps for reduced memory map size (US05978928, Robert A. Rust)
- draft-ietf-pkix-time-stamp-11.txt (Time Stamp Protocol)
- Internet X.509 Public Key Infrastructure. Data Validation and Certification Server Protocols (RFC 3029, Adams, Sylvester, Zolotarev, Zuccherato)
- How to Time-Stamp a Digital Document (Stuart Haber and W. Scott Stornetta, Journal of Cryptology, Vol. 3, No. 2, pp. 99-111 (1991))
- Efficient Broadcast Time-Stamping (Josh Benaloh and deMare, M.)
- Improving the Efficiency and Reliability of Digital Time-Stamping (Dave Bayer, Stuart Haber, and W. Scott Stornetta, 1993)
- Secure names for bit-strings (Stuart Haber and W. Scott Stornetta, 1997)
- Digital Time-stamping to Support Non Repudiation in Electronic Communications (Fernando Pinto, Vasco Freitas)
- Some Timestamping Protocol Failures (Mike Just)
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1998
- Time-Stamping With Binary Linking Schemes (Ahto Buldas, Peeter Laud, Helger Lipmaa, Jan Villemson, Crypto '98)
- New Linking Schemes for Digital Time-Stamping (Ahto Buldas, Peeter Laud, ICISC '98)
- Time-Stamping With Binary Linking Schemes (Ahto Buldas, Peeter Laud, Helger Lipmaa, Jan Villemson, Crypto '98)
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1999
- Integrating Time-Stamping and Notarization (Meelis Roos, master thesis, 1999)
- Secure and Efficient Time-Stamping Systems (Helger Lipmaa, PhD Thesis, 1999)
- Timestamps: Main issues on their use and implementation (Henri Massias, Xavier Serret and Jean-Jacques Quisquater)
- Design of a secure timestamping service with minimal trust requirement (Henri Massias, Xavier Serret and Jean-Jacques Quisquater)
- Design of a timestamping system (Preneel, Van Rompay, Quiaquater, Massias, Serret Avila)
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2000
- Optimally Efficient Accountable Time-Stamping (Ahto Buldas, Helger Lipmaa, Berry Schoenmakers, PKC '2000)
- Fast Verification in Group Hash Timestamp (Jungsoo Byun)
- A Local Time-stamping System (Jungsoo Byun, Alban Gabillon)
- Accountable Certificate Management using Undeniable Attestations ( Ahto Buldas, Peeter Laud, and Helger Lipmaa, ACM CCS 2001)
- [scholar]Management of Information Used to Verify Time Stamps in Linking Schemes (Computer Security Symposium, 2000)
- Time Stamps with both Time Information and Evidence: Security and Evidence Management Cost (Masashi Une and Tsutomu Matsumoto, 2000)
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2001
- Efficient Long-term Validation of Digital Signatures (Arne Ansper, Ahto Buldas, Meelis Roos, Jan Willemson, PKC 2001)
- Improving the Availability of Time-stamping Services (Arne Ansper, Ahto Buldas, Märt Saarepera, and Jan Willemson, ACISP 2001)
- Enabling the archival storage of signed documents (Petros Maniatis and Mary Baker, 2001)
- Enabling the Long-Term Archival of Signed Documents through Time Stamping (Petros Maniatis, T.J. Giuli, Mary Baker, 2001)
- Time Stamps with both Time Information and Evidence: Security and Evidence Management Cost ( Une Masashi, Matsumoto Tsutomu, 2001)
- A Study on Security of Time Stamping Protocols Cuculus and PKITS (Une Masashi, Matsumoto Tsutomu, 2001)
- The Security Evaluation of Time Stamping Schemes: The Present Situation and Studies (Masashi Une, 2001 (IMES Discussion Papers Series))
- [scholar]Relations between Security and Verification Procedures of Time Stamps (SCIS 2001, Masashi Une and Tsutomu Matsumoto (in Japanese))
- Ten Security Classes of Time Stamping Systems (IEICE TR, 2001, Masashi Une and Tsutomu Matsumoto (in Japanese))
- A Two-Level Time-Stamping System; A. Gabillon, J. Byun (IFIP/SEC 2001)
- A Study on Security of Time Stamping Protocols Cuculus and PKITS (Masashi Une and Tsutomu Matsumoto, 2001)
- Defining and Evaluating Availability of Time Stamping Schemes (Masashi Une, Tsutomu Matsumoto, 2001)
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2002
- Secure History Preservation Through Timeline Entanglement (Petros Maniatis, Mary Baker)
- Digital timestamps for dispute settlement in electronic commerce: generation, verification, and renewal (Matsuura, Imai, 2002)
- A Framework to Evaluate Security and Cost of Time Stamping Schemes (IEICE Trans. 2002, Masashi Une and Tsutomu Matsumoto)
- Size-efficient interval time stamps (Jan Villemson (Willemson), PhD thesis)
- On Optimal Hash Tree Traversal for Interval Time-Stamping (Helger Lipmaa, ISC 2002)
- A Time Stamped Virtual WORM System (A. Apvrille, J. Hughes, SECI 2002)
- Renewing Cryptographic Timestamps (S. Al-Riyami and C.J. Mitchell, CMS 2002)
- Classification of Time Stamping Schemes from the Viewpoint of Availability of Verification Procedures (Masashi Une, Tsutomu Matsumoto, 2002)
- Relationships between Time Stamping Schemes from Viewpoints of Availability and Integrity (Masashi Une, Tsutomu Matsumoto, 2002)
- XML Security Time Stamping Protocol (Axelle Apvrille, Vincent Girier, ISSE 2002)
- A new method for Digital Time-Stamping of Electronic Document (Everton Schonardie Pasqual, Júlio Dias, Ricardo Felipe Custódio, 2002)
- A Historic Name-Trail Service (Petros Maniatis, Mary Baker)
- Towards an XML Format for Time-Stamps (Karel Wouters, Bart Preneel, Ana Isabel González-Tablas, Arturo Ribagorda, XML 2002)
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2003
- Historic Integrity in Distributed Systems (Petros Maniatis, Stanford, 2003)
- A Write-once Data Management System (Harada etc, 2003)
- Providing Interoperable Timestamping Services (A. Cilardo, A. Mazzeo, L. Romano, G. P. Saggese, and G. Cattaneo, 2003)
- Providing Digital Time Stamping Services to Mobile Devices (D. Cotroneo, C. di Flora, A. Mazzeo, L. Romano, S. Russo, G. P. Saggese, Words 2003)
- Efficient relative time-stamping scheme based on the ternary link (Igarashi Y, Kuwakado H, Tanaka H, 2003)
- A Web Services Based Architecture for Digital Time Stamping (A. Cilardo, A. Mazzeo, L. Romano, G. P. Saggese, Journal of Web Engineering, 2003)
- Using Web Services Technology for Inter-Enterprise Integration of Digital Time Stamping (A. Cilardo, A. Mazzeo, L. Romano, G. P. Saggese, and G. Cattaneo)
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2004
- A Proposal for Distributed Digital Time-Stamping (Jon Busey)
- [scholar]On the design of time-stamped signatures (Sun HM, Chen BC, Yeh HT, Journal CSS, 2004)
- Passive Timestamping in the Bounded Storage Model (Amnon Ta-Shma, Crypto 2004)
- Formal proof of correctness of scalable event-ordering system (Mizuhito Ogawa, Eiichi Horita, Satoshi Ono, 2004)
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2005
- A High Performance Solution for Providing Digital Time Stamping Services to Mobile Devices (A. Cilardo, D. Cotroneo, C. di Flora, A. Mazzeo, L. Romano, S. Russo, 2005)
- CATS: Certified Authenticated Tamper-evident State Store for Network Services (Aydan R. Yumerefendi and Jeffrey S. Chase, 2005)
- Formal proof of correctness of scalable event-ordering system Mizuhito OGAWA, Eiichi HORITA, and Satoshi ONO, 2005 (20.05.05 )
- On Universal Composable Security of Time-Stamping Protocols (Toshihiko Matsuo and Shin.ichiro Matsuo, eprint 2005/148)
- Universally Composable Time-Stamping Schemes with Audit (Ahto Buldas Peeter Laud Mart Saarepera Jan Willemson, eprint 2005/198)
- A Distributed Time Stamping Scheme (A. Bonnecaze, P. Liardet, A. Gabillon, K. Blibech, 2005)
- Implementation of an Evidentiary Record Validation Utility and Security Analysis for Surety's AbsoluteProo ( Michael Thimblin, NagaSree Chandu Kamisetty, Padmanabhan Raman, Anupama Paila, 2005)
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2006
- A Time-Stamping Proxy Signature Scheme Using Time-Stamping Service (Eric Jui-Lin Lu and Cheng-Jian Huang, IJNS 2006)
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2007
- Knowledge-Binding Commitments with Applications in Time-Stamping (Ahto Buldas, Sven Laur, eprint 2007/071)
- Techniques for Digital Timestamping (Mike Just)
- Tecniche di Time-Stamping (a survey in Italian)
- C^asovno Z^igosanje v elektronskem poslovanju in njegova implementacija v slovenski drz^avni upravi (Mitja Dec^man, MSc thesis (Slovenia))
- PKI: gli strumenti tecnologici
- How Do Digital Time-Stamps Support Digital Signatures? (Haber, Kaliski, Stornetta (Cryptobytes))
- Ajatemplid digitaaldokumentidel (Ahto Buldas, Helger Lipmaa, in Estonian)
- Adding Non-Repudiation to Web Transactions (Blixt, Hagström)
- Digital Signatures and Authentication (Helger Lipmaa, from signatures to time-stamping)
- TORSEC Time Stamp reference page
- Digital Time-Stamping Applications (Jean Marc Dieu)
- Digital Notary Technical Overview (Surety)
- Time-Stamping for Malaysia (Surya Ismail)
- Mary Baker (Stanford)
- Dave Bayer (Columbia)
- Josh Benaloh (Microsoft)
- Ahto Buldas (Küberneetika AS)
- Jungsoo Byun (Toulon)
- Vasco Freitas (Minho)
- Stuart Haber (STAR-LAB)
- Mike Just (Entrust)
- Peeter Laud (Saarbrücken)
- Helger Lipmaa (University College London)
- Petros Maniatis (Stanford)
- Henry Massias (Louvain)
- Meelis Roos (Küberneetika)
- Kouichi Sakurai (Kyushu)
Berry Schoenmakers (Eindhoven) - Jan Villemson (Küberneetika)
- Time Stamping (José A. Mañas)
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Timed-release crypto
- Time-lock puzzles and timed-release Crypto (Ronald L. Rivest, Adi Shamir, and David A. Wagner)
- Efficient Timed-release Public-key Encryption (Giovanni Di Crescenzo, Rafail Ostrovsky and S. Rajagopalan)
- Timed-Release Cryptography (Wenbo Mao, eprint 2001/014)
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Non-Repudiation
- Jianying Zhou's Publications
- Non-repudiation in Electronic Commerce (Jianying Zhou (Artech House, 2001))
- @Public-Key Infrastructure Links (Helger Lipmaa)
- High Resolution Time Stamp Facility (IBM Alphaworks)
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