pdf - DSS, VRI - what is so mystructure? -

i've sign document using itext. i've ltv too.

i read in itext documentation - "the dss contains references certificates, , can add references ocsp responses , crls can used re-verify certificates"

yes, fount them in dss.

i read thet: "in dss, can store vri"

i dont understand why vri for? because there same ocsp responses , certificates , in dss.

also wat /61a2411b1..... means? hash or random number?

the structures interested in defined in etsi ts 102 778-4.

i dont understand why vri for? because there same ocsp responses , certificates , in dss.

while certs, ocsps, , crls arrays in dss dictionary reference certificates, ocsp responses, , certificate revocation lists that may used in validation of signatures in document, vri dictionary contains signature vri dictionaries reference validation-related information single signature.

as document contained 1 signature, information looks unnecessarily duplicated.

also wat /61a2411b1..... means? hash or random number?

the key of each entry in vri dictionary base-16-encoded (uppercase) sha1 digest of signature applies.

ps: clarify: key in last sentence refers pdf structure: vri dictionary pdf dictionary in key (a pdf name object) mapped value (another pdf object, in case pdf dictionary). not cryptographic key signature...

thus, take signature in question, calculate sha1 hash, write in uppercase base-16-encoding, make string pdf name, , use pdf name pdf dictionary key.