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Topic: Trusted Third Party

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Certificate authority

Kerberos (protocol)

	Trusted third party - Open Encyclopedia (Site not responding. Last check: 2007-09-17)
		In cryptography, a trusted third party (TTP) is an entity which facilitates interactions between two parties who both trust the third party; they use this trust to secure their own interactions.
		In this case, a TTP is a third party who may have previously seen Bob (in person), or is otherwise willing to vouch that this key (typically in an identity certificate) belongs to the person indicated in that certificate, in this case, Bob.
		Courts are also trusted third parties in the sense that disputes brought before them are presumed to be decided in a disinterested and dispassionate way consonant with a body of established law and (in common law countries) precedent.
	www.open-encyclopedia.com /Trusted_third_party (512 words)

	Trusted third party (Site not responding. Last check: 2007-09-17)
		Trusted third party (TTP) is a concept from cryptography.
		A TTP is a third party who has previously seen Bob (in person) and has his key, and gives it to Alice.
		A TTP's role in cryptography is usually much the same, simply acting as a Certificate authority to establish the identity of a key's owner.
	www.bopedia.com /en/wikipedia/t/tr/trusted_third_party.html (135 words)

	Secure key issuing cryptography - Wikipedia, the free encyclopedia
		Secure key issuing is variant of ID-based cryptography that reduces the level of trust that needs to be placed in a trusted third party by spreading the trust across multiple third parties.
		The third party provides a "blinded" partial private key, which is then passed on to several other third party in order, each adding another part of the key before blinding it and passing it on.
		If all of the third parties cooperate they can recover the private key, so key escrow problems arise only if all of the third parties are untrustworthy.
	en.wikipedia.org /wiki/Secure_key_issuing_cryptography (228 words)

	Trusted third party -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-09-17)
		In (Act of writing in code or cipher) cryptography, a trusted third party (TTP) is an entity which facilitates interactions between two parties who both trust the third party; they use this trust to secure their own interactions.
		TTPs are common in (Click link for more info and facts about cryptographic protocol) cryptographic protocols, for example, a (Click link for more info and facts about certificate authority) certificate authority (CA).
		In this case, a TTP is a third party who may have previously seen Bob (in person), or is otherwise willing to vouch that this key (typically in an (Click link for more info and facts about identity certificate) identity certificate) belongs to the person indicated in that certificate, in this case, Bob.
	www.absoluteastronomy.com /encyclopedia/t/tr/trusted_third_party.htm (604 words)

	Trusted Third Party (Site not responding. Last check: 2007-09-17)
		In cryptography a Trusted Third Party (TTP) is an entity (eg a person company a government agency...) who carries a necessary part of some cryptographic protocols.
		In this case TTP is a Third Party who may previously seen Bob (in person) or is willing to vouch that this key (typically in an identity certificate) belongs to the person indicated in certificate in this case Bob.
		Courts are also trusted third parties in sense that disputes brought before them are to be decided in a disinterested and way consonant with a body of established law and (in common law countries) precedent.
	www.freeglossary.com /Trusted_third_party (648 words)

	Certified email with a light online trusted third party
		In particular, if the trusted third party is mostly off-line, then the sender of a message may need to be on-line for some long period after sending the message, and may need to run special-purpose server code to respond to queries by the receiver.
		The main challenge is to verify, without involving the trusted third party, that the messages that are exchanged in the first round are indeed the required messages encrypted under the trusted third party's public key.
		The Tricert system [3] is a hybrid system that distributes the task of the trusted third party to less trusted postal agents that perform the on-line work, and to a trusted third party that is only involved in disputes.
	www.www2002.org /CDROM/refereed/488 (6542 words)

	Trusted Third Party (Site not responding. Last check: 2007-09-17)
		A Trusted Third Party (TTP) is an entity (eg, a person, a company, a government agency,...)who carries out a necessary part of some cryptographicprotocols.
		A key signing party are one way of combining a get together with some certificate signing.Nonetheless, doubt and caution remain sensible as some users have been careless in signing others' certificates.
		Courts are also trusted third parties in the sense that disputes brought before themare presumed to be decided in a disinterested and dispassionate way in consonance with a body of established law and (in common law countries) precedent.
	www.therfcc.org /trusted-third-party-163567.html (490 words)

	[No title]
		Trusted Third Party encryption provides users with their own private keys for authentication and public keys which they may give to other parties.
		A warrant served on a Trusted Third Party would be much less likely to encounter frustration tactics and the Trusted Third Party would be bound by legal rules, backed up by the court's power to punish for contempt, and possibly also by the prospect of its registration being cancelled.
		Evidence given by a Trusted Third Party relating to the content of stored data or the meaning of encrypted messages could be relied upon to a much greater extent than evidence of the accused or of the relevant law enforcement agency.
	www.anu.edu.au /people/Roger.Clarke/II/Ford960619.html (7121 words)

	[No title]
		The trusted third party acts as a witness to the agreement at the time it is made, and, at a later date, may be called upon to attest to the validity of the agreement.
		The third party should be able to attest that one document contains the same information as another and the validity of all contained digital signatures and the identity of the signers.
		The trusted third party is used to document and later provide proof that an individual has made a particular statement or agreement, in a specified ceremony or event.
	wwwsnmp.cs.utwente.nl /ietf/internetdrafts/complete/draft-ietf-ltans-notareqs-01.txt (2293 words)

	DEPLOYING QUALITY MANAGEMENT IN TRUSTED THIRD PARTIES WITHIN A MEDICAL ENVIRONMENT. TOWARDS ISO9000 COMPLIANCE
		A Trusted Third Party (TTP) may exist within the PKI as a governmental institution, as a private business or as a non-profit research organisation.
		The purpose of the TTP and its services is to serve the medical IT community as a trusted entity, who will, upon request, bind legally and indisputably a user, company or computer with their digital identity or certificate.
		In the case of TTP, the implementation of process quality control has direct interaction with the user requirements and with the specifications and the features that have to be achieved, as well as with the other elements of the quality system.
	www.syros.aegean.gr /users/lekkas/pubs/j/ISHIMR2001.htm (5128 words)

	The God Protocols - ITAudit - The Institute of Internal Auditors (The IIA)
		Multi-party secure computation allows any number of parties to share a computation, each learning only what can be inferred from their own input and the output of the computation.
		The third limitation is that, far from being omniscient or omnipotent, the protocol will accomplish only what is specified in the algorithm and the inputs.
		It won't be able to replace human-trusted third parties where those parties provide insight or knowledge that cannot be provided by a computer.
	www.theiia.org /itaudit/index.cfm?fuseaction=forum&fid=216 (1542 words)

	Trusted Third Party Services for Deploying Secure Telemedical Applications over the WWW
		Although the developed trust model is designed according to the hierarchical trust model, the overall Directory set-up is still an open issue, since it depends heavily on organisational factors that vary across different organisations and countries.
		Special procedures are guaranteeing the integrity of the public keys at the top of the trust hierarchy since the trust and integrity of the whole certification process hinges on these public keys.
		The safest professional and customer-friendly approach to a medical TTP would appear to be one that provides no access to keys which are used for encryption for confidentiality, while the safest political and technical approach would be to build in such facilities and rely on legal and organisational safeguards to control their use.
	www.spinellis.gr /pubs/jrnl/1999-CompSec-euromed/html/ttpwww.html (6359 words)

	U.S. Pregrant 20030084003 - Systems and methods for conducting transactions and communications using a trusted third ... (Site not responding. Last check: 2007-09-17)
		The trusted third party compares the hash that was computed by the receiver with another hash computed by the sender.
		In some embodiments, the receiver may also send the third party payment information so that the sender, the content owner, and/or the third party can be paid for their role in the transaction.
		In a preferred embodiment, the payment information is only sent to, and/or used by, the third party once the third party has confirmed to the satisfaction of the receiver that the encrypted file in the receiver's possession will decrypt correctly.
	cxp.paterra.com /uspregrant20030084003.html (318 words)

	[No title]
		In some cases this creates a potential problem for the users of encryption themselves; the cost of keeping unauthorized parties out is that if keys are lost or unavailable at the time they are needed, the owners of the encrypted data will be unable to make use of their own information.
		Users would normally be trusted to participate in assuring recoverability of their own keys, assisted by local management practices and supervision.
		A CA is a trusted party that vouches for the identity (or some other attribute) of an encryption user.
	www.crypto.com /papers/key_study.txt (8646 words)

	Re: Untrusting a Trusted Third Party: TSA.
		Alfonso - The instant of trust for the issuance of the time stamping token happens when the token is verified.
		At this instant the TSA can easily return a commentary to the questioning client that its clocks drifted xy and z amount and as such the relying party can take the testimony of the TSA as being that the actual time the incident happened was XY and Z + drift_value.
		There is nothing anywhere that says that the TST itself is the testimony of the TSA, just the token to prove that some TS was actually issued - i.e its a receipt and not a very good one.
	www.imc.org /ietf-pkix/old-archive-01/msg02284.html (370 words)

	Re: Untrusting a Trusted Third Party: TSA.
		The instant of trust for the issuance of the time stamping token happens when the token is verified.
		This is an important concept and is crucial to many many use models, but since the Authors decided not to add use models to the draft or delineate them in a corresponding use document, well...
		Previous by thread: Untrusting a Trusted Third Party: TSA.
	www.imc.org /ietf-pkix/old-archive-01/msg02258.html (414 words)

	[No title]
		This document describes a efficient scheme for using mutually trusted third parties to mediate authentication, as a direct extension of the digest access authentication scheme.
		If a mutually trusted authentication server is found, or the user has enterered a user name and password for an authentication server in the previous step, then the client sends a authentication request to the authentication server, as described below.
		This identifies a trusted third party which was used to mediate authentication.
	www.ics.uci.edu /pub/ietf/http/draft-ietf-http-mda-00.txt (3498 words)

	Comments of U.S. Postal Service on S7-27-03
		The combination of these technologies maintained in the USPS EPM repository provides third party evidence to support non-repudiation of electronic transactions and is designed to detect the fraudulent tampering or inadvertent altering of electronic data.
		Security experts agree that trusted time stamps and trusted third party archival of signatures and receipts are necessary to ensure long-term non-repudiation.
		Should there ever be a need to utilize newer, stronger algorithms, a trusted third party could re-sign the signatures and time stamps, thus preserving a chain of trust from the original as far into the future as required.
	www.sec.gov /rules/proposed/s72703/uspostal020204.htm (1802 words)

	ipedia.com: Trusted Third Party Article (Site not responding. Last check: 2007-09-17)
		In cryptography, a Trusted Third Party is an entity who carries out a necessary part of some cryptographic protocols.
		In cryptography, a Trusted Third Party (TTP) is an entity (eg, a person, a company, a government agency,...) who carries out a necessary part of some cryptographic protocols.
		Such uses are terms of art, in this case finessing certain possibilities (eg, untrustworthiness of a Third Party) in order to concentrate on other issues more immediately central.
	www.ipedia.com /trusted_third_party_1.html (627 words)

	Piggy-backed key exchange protocol for providing secure low-overhead browser connections from a client to a server ... (Site not responding. Last check: 2007-09-17)
		ID(X) is the identity of party X. The manner in which a party is identified does not form part of the present invention, and any appropriate technique may be used without deviating from the inventive concepts disclosed herein.
		In a third scenario, the client may initially use an encoding scheme which it shares with a trusted third party, but not with the server, where the server has no trust (and possibly no shared message encoding scheme) with this TTP.
		Also identically to the final message of the third embodiment (both aspects), the server then encrypts the requested content using a new shared key k(new); encrypts its nonce using the client's public key; piggy-backs the encrypted server nonce onto the encrypted content; and transmits this as its response to the client.
	www.freepatentsonline.com /6775772.html (13058 words)

	Web of Trust - thawte
		The Trusted Third Party (TTP) process is designed for people who do not have any thawte Notaries in their area but would like to get their identities validated.
		The Trusted Third Parties that you can use are attorneys, certified public accountants and bank managers.
		By joining the thawte Web of Trust program you confirm that you are not in violation of the laws and regulations of your country and/or jurisdiction.
	www.thawte.com /en/secure-email/web-of-trust-wot/wot_parties.html (498 words)

	Business aspects of Trusted Third Party services in Europe (Site not responding. Last check: 2007-09-17)
		The existing trusted services are very much based on the certification method, in which a specific key as a unique code is linked to an entry, which could be an organization or an individual.
		If owners of a globally recognized, trusted and admired brand name distribute solid, well-known goods and services, the consumer is not sure whether the provided electronic services are secure, but he simply trusts the organization.
		Fisher concludes that e-commerce and e-services are really taking off to such an extent that all of them need trusted third party services to organize their business in a proper way.
	www.hoise.com /vmw/99/articles/vmw/LV-VM-05-99-17.html (930 words)

	Trusted Third Party (Site not responding. Last check: 2007-09-17)
		A trusted third party is someone both communicating parties trusts.
		This party authenticates Party A using older style methods (ID Card) and verifies they own the private key.
		Since party B trusts the public key of the third party, when it decrypts the signature on party A’s Public key it can then trust A’s public key.
	publish.uwo.ca /~jonny/pki/tsld009.htm (79 words)

	The Risks Of "Key Recovery," "Key Escrow," And "Trusted Third-Party" Encryption \| 1998
		A variety of "key recovery," "key escrow," and "trusted third-party" encryption requirements have been suggested in recent years by government agencies seeking to conduct covert surveillance within the changing environments brought about by new technologies.
		A mechanism, external to the primary means of encryption and decryption, by which a third party can obtain covert access to the plaintext of encrypted data.
		An active member of the cryptology research community, he is responsible for a number of cryptographic concepts and systems, including trust management, remotely-keyed encryption, proxy cryptography and IP-layer and file-system layer security protocols.
	www.cdt.org /crypto/risks98 (10616 words)

	Untrusting a Trusted Third Party: TSA.
		Hi Everyone, The following consideration is quite obvious; however, it's intriguing to see how the TSP allows a user to perform a simple test against a TSA that he doesn't trust anymore.
		The test The ordering of time-stamp tokens issued by different TSAs is only possible when the _absolute value_ (*) of the difference between the genTime of the first time-stamp token and the genTime of the second time-stamp token is greater than the sum of the accuracies of the genTime for each time-stamp token.
		TSA-1: the tsa not trusted anymore by alice TSA-2..TSA-3: tsa still trusted by alice 1.
	www.imc.org /ietf-pkix/old-archive-01/msg02238.html (229 words)

	Trusted Third Party (TTP)
		Parties on the Internet can use digital certificates in order to guarantee integrity and authenticity of shared messages.
		This document establishes the legal infrastructure and operating metrics for PinkRoccade Trusted Services’ position as a trusted third party on the Internet by covering important issues such as verification requirements for certificate applications, issuing procedures, and revocation.
		PinkRoccade Trusted Services has a broad range of solutions to allow other organizations to establish themselves as Certificate Authorities for their Intranets and Extranets.Establishing your own Public Key Infrastructure would require heavy investments in a high quality set of technology, infrastructure and practices.
	www.pki.pinkroccade.com /print.php3?id=8 (527 words)

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