Merge pull request cheat#40 from 8go/patch-4

added "ideal" options to gpg

gpg

@@ -171,3 +171,32 @@
     gpg -K
 
   Should show sec# instead of just sec.
+
+# High-quality options for gpg for symmetric (secret key) encryption
+
+  This is what knowledgable people consider a good set of options for 
+  symmetric encryption with gpg to give you a high-quality result.
+
+  gpg \
+    --symmetric \
+    --cipher-algo aes256 \
+    --digest-algo sha512 \
+    --cert-digest-algo sha512 \
+    --compress-algo none -z 0 \
+    --s2k-mode 3 \
+    --s2k-digest-algo sha512 \
+    --s2k-count 65011712 \
+    --force-mdc \
+    --pinentry-mode loopback \
+    --armor \
+    --no-symkey-cache \
+    --output somefile.gpg \
+    somefile # to encrypt
+
+  gpg \
+    --decrypt \
+    --pinentry-mode loopback \
+    --armor \
+    --output somefile.gpg \
+    somefile # to decrypt
+