diff options
Diffstat (limited to 'runtime/doc/usr_23.txt')
| -rw-r--r-- | runtime/doc/usr_23.txt | 20 |
1 files changed, 11 insertions, 9 deletions
diff --git a/runtime/doc/usr_23.txt b/runtime/doc/usr_23.txt index c09e5b919..63cf315ef 100644 --- a/runtime/doc/usr_23.txt +++ b/runtime/doc/usr_23.txt @@ -208,15 +208,17 @@ encryption key, just like the "-x" argument did: > LIMITS ON ENCRYPTION -The encryption algorithm used by Vim is weak. It is good enough to keep out -the casual prowler, but not good enough to keep out a cryptology expert with -lots of time on his hands. Also you should be aware that the swap file is not -encrypted; so while you are editing, people with superuser privileges can read -the unencrypted text from this file. - One way to avoid letting people read your swap file is to avoid using one. -If the -n argument is supplied on the command line, no swap file is used -(instead, Vim puts everything in memory). For example, to edit the encrypted -file "file.txt" without a swap file use the following command: > +The encryption algorithm used by Vim is not very strong. It is good enough to +keep out the casual prowler, but not good enough to keep out a cryptology +expert with lots of time on his hands. The text in the swap file and the undo +file is also encrypted. However, this is done block-by-block and may reduce +the time needed to crack a password. You can disable the swap file, but then +a crash will cause you to lose your work, since Vim keeps all the text in +memory only. The undo file can be disabled with the only disadvantage that +you can't undo after unloading the buffer. + To avoid using a swap file, supply the -n argument on the command line. +For example, to edit the encrypted file "file.txt" without a swap file use the +following command: > vim -x -n file.txt |