Print Page - PDF Version 1.4 Encryption Standard 1.2

Title: PDF Version 1.4 Encryption Standard 1.2
Post by: tomek on March 10, 2011, 11:49:33 AM

Quick question:
When exiftool reports PDF Version 1.4 Encryption Standard 1.2 - is this 40-bit or 128-bit encryption? Please advise. Here is full output:
>exiftool b.pdf
ExifTool Version Number : 7.76
File Name : b.pdf
Directory : .
File Size : 349 kB
File Modification Date/Time : 2011:03:10 11:10:07-05:00
File Type : PDF
MIME Type : application/pdf
PDF Version : 1.4
Encryption : Standard v1.2
Warning : Document is password encrypted

Title: Re: PDF Version 1.4 Encryption Standard 1.2
Post by: Phil Harvey on March 10, 2011, 12:07:26 PM

First, you should update your ExifTool version. Support for AES-128 and AES-256 encryption and the ability to specify passwords was added in version 8.35.

But to answer your question, version 1 is 40-bit encryption.

- Phil

Edit: I'll add the bit length to the value of the extracted "Encryption" tag in ExifTool 8.51.

Title: Re: PDF Version 1.4 Encryption Standard 1.2
Post by: tomek on March 10, 2011, 12:36:22 PM

Thanks for your quick reply!

Tomek

ExifTool Forum

General => Metadata => Topic started by: tomek on March 10, 2011, 11:49:33 AM