With the introduction of the Central Directory Encryption
feature in version 6.2 of this specification, the Central
Directory Structure MAY be stored both compressed and encrypted.
Although not required, it is assumed when encrypting the
Central Directory Structure, that it will be compressed
for greater storage efficiency. Information on the
Central Directory Encryption feature can be found in the section
describing the Strong Encryption Specification. The Digital
Signature record will be neither compressed nor encrypted.
4.3.13 Digital signature:
header signature 4 bytes (0x05054b50) size of data 2 bytes signature data (variable size)With the introduction of the Central Directory Encryption feature in version 6.2 of this specification, the Central Directory Structure MAY be stored both compressed and encrypted. Although not required, it is assumed when encrypting the Central Directory Structure, that it will be compressed for greater storage efficiency. Information on the Central Directory Encryption feature can be found in the section describing the Strong Encryption Specification. The Digital Signature record will be neither compressed nor encrypted.