add alt-text

content/elsewhere/simple-secure-file-transmission/index.md

@@ -54,7 +54,7 @@ From here, I'd move the encrypted file to my Dropbox public folder and
 send Chris the generated link, as well as the output of `encrypt.sh`,
 over IM:
 
-{{<dither lSEsz5z.jpg "" "inline" />}}
+{{<dither lSEsz5z.jpg "" "inline">}}Instant message thread where David Eisinger shares a Dropbox link and an OpenSSL command, and Chris Jones replies “got it” one minute later in the muted IM client window.{{</dither>}}
 
 Once he acknowledges that he's received the file, I immediately delete
 it.
@@ -65,7 +65,7 @@ Now I need to send Chris the password. Here's what I **don't** do: send
 it to him over the same channel that I used to send the file itself.
 Instead, I pull out my phone and send it to him as a text message:
 
-{{<dither pQHZlkO.jpg "" "inline" />}}
+{{<dither pQHZlkO.jpg "" "inline">}}Text exchange showing one friend confidently promising, “I can get you a toe by 3 o’clock this afternoon,” and the other dryly replying, “With nail polish?”{{</dither>}}
 
 Now Chris has the file, instructions to decrypt it, and the passphrase,
 so he's good to go. An attacker, meanwhile, would need access to both