Definition: e-Timestamp Verification and Validation Service ABB is an Application Service verifing timestamps used for establishing evidence that a give piece of data existed at a given point in time. An ‘electronic time stamp’ means data in electronic form which binds other data in electronic form to a particular time establishing evidence that the latter data existed at that time. Source: eIDAS - REGULATION (EU) No 910/2014 OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 23 July 2014 on electronic identification and trust services for electronic transactions in the internal market and repealing Directive 1999/93/EC. Source reference: (http://eur-lex.europa.eu/legal-content/EN/TXT/?uri=uriserv%3AOJ.L_.2014.257.01.0073.01.ENG) Additional information: This service is often used in the context of digital signatures and data integrity, where it is crucial to establish when a document was signed or when data was created or last modified. The timestamp is created by a trusted third party, known as a Timestamping Authority (TSA), which attests to the time and date the data was presented to it without any alterations. The TSA uses a cryptographic hash function to generate a unique hash of the submitted data, then signs this hash with its private key, creating a timestamp token that can be verified using the TSA's public key. This process ensures non-repudiation, meaning that the parties involved cannot deny the existence of the data at the time it was timestamped. Example: The following implementation is an example on how this specific Architecture Building Block (ABB) can be instantiated as a Solution Building Block (SBB): OpenSSL timestamp verification - OpenSSL is an open-source tool that can be used to retrieve and verify digital timestamps.(https://wiki.openssl.org/index.php/Manual:Ts(1)) (https://www.digistamp.com/technical/software-alternatives/using-openssl-to-request-timestamps/) Interoperability Dimension: Structural IoP Identifier: http://data.europa.eu/dr8/egovera/DigitalCertificationTimestampApplicationService ABB name: egovera:DigitalCertificationTimestampApplicationService EIRA concept: eira:ArchitectureBuildingBlock Last modification: 2023-11-20 Identifier: http://data.europa.eu/dr8/egovera/DigitalCertificationTimestampApplicationService Name: Digital Certification Timestamp Application Service Interoperability Layer: TechnicalApplication Specialises: http://data.europa.eu/dr8/DigitalSolutionApplicationService