VEntry

Héritage et contrats

Parent : PDF\Specification\SchemaEntry

Définition dans la norme

Tableau 20 · Entries common to all encryption dictionaries
ISO 32000-1:2008, §7.6.1 · page PDF 64 ↗

/V number

(Optional) A code specifying the algorithm to be used in encrypting and decrypting the document: 0 An algorithm that is undocumented. This value shall not be used. 1 "Algorithm 1: Encryption of data using the RC4 or AES algorithms" in 7.6.2, "General Encryption Algorithm," with an encryption key length of 40 bits; see below. 2 (PDF 1.4) "Algorithm 1: Encryption of data using the RC4 or AES algorithms" in 7.6.2, "General Encryption Algorithm," but permitting encryption key lengths greater than 40 bits. 3 (PDF 1.4) An unpublished algorithm that permits encryption key lengths ranging from 40 to 128 bits. This value shall not appear in a conforming PDF file. 4 (PDF 1.5) The security handler defines the use of encryption and decryption in the document, using the rules specified by the CF, StmF, and StrF entries. The default value if this entry is omitted shall be 0, but when present should be a value of 1 or greater.

Qualificateur : Optional

Les descriptions conditionnelles restent traçables. La présence d’une définition ne réalise pas à elle seule un codec, une signature ou tous les traitements du format. Lire la couverture.

Construction

Méthodes héritées

Propriétés

Constantes

'V'

'20'

false