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In b-lt or b-LTV (the most complex) certificates remain valid for a very long term. PAdES allows certificates to be verified even after many decades at any time in the future, in spite of technological and other advances. If in the document itself the validar to confirm that the signature was valid is concept known as long-term validation (LTV ...
In public key infrastructure (PKI) systems, a certificate signing request (CSR or certification request) is a message sent from an applicant to a certificate authority of the public key infrastructure (PKI) in order to apply for a digital identity certificate. The CSR usually contains the public key for which the certificate should be issued ...
XAdES-B-LT (Signature with Long Term Data), Certificates and revocation data are embedded to allow verification in the future even if their original source is not available. XAdES-B-LTA (Signature with Long Term Data and Archive timestamp), By using periodical timestamping (e.g. each year) compromising is prevented which could be caused by ...
However it will reach a higher probative value when enhanced to the level of a qualified electronic signature. By adding a certificate that has been issued by a qualified trust service provider that attests to the authenticity of the qualified signature, the upgraded advanced signature then carries according to Article 24 (2) of the eIDAS ...
In the context of Regulation (EU) No 910/2014 , a qualified digital certificate is a public key certificate issued by a trust service provider which has government-issued qualifications. The certificate is designed to ensure the authenticity and data integrity of an electronic signature and its accompanying message and/or attached data. [1]
When a certificate is issued, it can be stated in its attributes what use cases it is intended to fulfill. For example, a certificate can be issued for digital signature of e-mail (aka S/MIME), encryption of data, authentication (e.g. of a Web server, as when one uses HTTPS) or further issuance of certificates (delegation of authority ...
A log appends new certificates to an ever-growing Merkle hash tree. [1]: §4 To be seen as behaving correctly, a log must: Verify that each submitted certificate or precertificate has a valid signature chain leading back to a trusted root certificate authority certificate. Refuse to publish certificates without this valid signature chain.
Uniqueness and malleability of signatures. A signature itself cannot be used to uniquely identify the message it signs—in some signature schemes, every message has a large number of possible valid signatures from the same signer, and it may be easy, even without knowledge of the private key, to transform one valid signature into another. [36]