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PDF hash ranges - ETSI vs Adobe Reader

New Here ,
Feb 03, 2024 Feb 03, 2024

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I use Adobe Reader to properly sign a PDF document. According to the entries in ByteRange, the upper section to be hashed is up to the beginning of the signature, NOT including the '<'. Similarly, the lower section to be hashed starts right after the '>'. Both '<' and '>' belong to neither the data to be hashed nor to the signature itself. However, the standard ETSI EN 319 142-2 V1.1.1 (2016-04)   displays the following Fig A.1:

Gaby33865825_0-1706991937224.png

 

 

 

The standard insists that both '<' and '>' should be included in the hash.

Any idea how to resolve this discrepancy?

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Security digital signatures and esignatures

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