Search found 74 matches

by Vincent17
Tue Jul 20, 2021 11:44 am
Forum: General
Topic: Survey: Advanced Encryption Settings (installer) [Solved]
Replies: 19
Views: 1877

Re: Survey: Advanced Encryption Settings (installer) [Solved]

Unlikely I'll ever change the defaults, but I voted "yes" because it's educational to see the options and read the help panel.
by Vincent17
Mon Jun 07, 2021 11:10 pm
Forum: Security
Topic: qpdf --encrypt
Replies: 11
Views: 1571

Re: qpdf --encrypt

Executive summary of my trip down this rabbit hole :p I hope it's useful to someone. "not secure at all"[1] qpdf --encrypt $pw "" [any key length] -- in.pdf out.pdf "more or less trivially decrypted"[1,4] by brute force (RC4 algorithm, 40-bit key) qpdf --encrypt $pw $pw...
by Vincent17
Sun Jun 06, 2021 12:50 pm
Forum: Bugs and Non-Package Requests Forum
Topic: qpdfview won't open 256-bit encrypted pdfs
Replies: 3
Views: 865

Re: qpdfview won't open 256-bit encrypted pdfs

I asked "Should qpdfview be able to open files with 256 bit encryption?" at answers.launchpad.net/qpdfview The reply was "It depends on your Poppler version." In antiX 17.4.1_386-base, both evince and qpdfview open test256.pdf. Only 3 poppler items are installed: libpoppler64 and...
by Vincent17
Fri Jun 04, 2021 12:14 am
Forum: Bugs and Non-Package Requests Forum
Topic: qpdfview won't open 256-bit encrypted pdfs
Replies: 3
Views: 865

Re: qpdfview won't open 256-bit encrypted pdfs

Stevo wrote: Thu Jun 03, 2021 3:44 pm qpdfview won't open them in MX 18 and MX 19? Is it supposed to?
I don't know. I assume it should since evince (in antiX), firefox (in MX), acrobat (in W10) open them.
by Vincent17
Thu Jun 03, 2021 1:09 pm
Forum: Bugs and Non-Package Requests Forum
Topic: qpdfview won't open 256-bit encrypted pdfs
Replies: 3
Views: 865

qpdfview won't open 256-bit encrypted pdfs

A pdf encrypted by qpdf with 256-bit encryption won't open in qpdfview or evince in MX-18.3. The same file opens in a browser. qpdf --encrypt $x $x 256 -- test.pdf test256.pdf /usr/bin/qpdfview test256.pdf "Error: Incorrect password" "Error: Incorrect password" vivaldi test256.pd...
by Vincent17
Fri May 28, 2021 7:43 pm
Forum: Security
Topic: qpdf --encrypt
Replies: 11
Views: 1571

Re: qpdf --encrypt

Regarding encryption of pdf, qpdf maintainer jberkenbilt provided some useful information. I asked if security was comparable for these two cases: qpdf --encrypt $pw1 $pw2 128 --use-aes=y -- doc.pdf encrypted-doc.pdf gpg --symmetric --cipher-algo AES128 doc.pdf He replied that if the --object-stream...
by Vincent17
Sun May 16, 2021 3:10 pm
Forum: Security
Topic: qpdf --encrypt
Replies: 11
Views: 1571

Re: qpdf --encrypt

Thanks for the ideas. Figueroa, thanks for confirming my observation. Alternate; you can encrypt the file with gpg. Thereby hangs a tale. I agree, gpg would be ideal, and have I tried hard for years to persuade the people I correspond with to love it. But they use it so seldom that it's unreliable t...
by Vincent17
Sun May 16, 2021 1:17 pm
Forum: Security
Topic: qpdf --encrypt
Replies: 11
Views: 1571

qpdf --encrypt

EDIT: most of my questions and misunderstandings were resolved by qpdf developer Jay Berkenbilt; see post #10 for a summary. I use qpdf to encrypt pdf files for cloud. The 256 key length option seems to be broken. qpdf --encrypt user-password owner-password key-length flags -- infile outfile qpdf -...
by Vincent17
Sun Jan 17, 2021 1:32 pm
Forum: Older Versions
Topic: snapshot iso lacks vmlinuz [solved]
Replies: 17
Views: 4658

Re: snapshot iso lacks vmlinuz

spot@Pluto:~/ > cat /etc/fstab # Pluggable devices are handled by uDev, they are not in fstab /dev/mapper/rootfs / ext4 defaults,noatime 1 1 # UUID=7c649f35-68ba-4ca9-b8d0-8306f41e0a29 /boot ext4 defaults,noatime 1 1 # UUID=7779-FE2A /boot/efi vfat defaults,noatime,dmask=0002,fmask=0113 0 0 /dev/ma...
by Vincent17
Sun Jan 17, 2021 12:13 am
Forum: Older Versions
Topic: snapshot iso lacks vmlinuz [solved]
Replies: 17
Views: 4658

Re: snapshot iso lacks vmlinuz

JayM, will do that and report back. spot@Pluto:~/ > ls -l /media/spot/boot total 192944 -rw-r--r-- 1 root root 197461 Feb 24 2018 config-4.14.0-3-amd64 -rw-r--r-- 1 root root 199707 Apr 22 2018 config-4.15.0-1-amd64 -rw-r--r-- 1 root root 206379 Nov 16 2019 config-4.19.0-6-amd64 drwxr-xr-x 2 root ro...

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