[tor-bugs] #6369 [Analysis]: Gather empirical data on AES/RSA operations performed by typical relays or bridges

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#6369: Gather empirical data on AES/RSA operations performed by typical relays or
bridges
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 Reporter:  karsten   |          Owner:  karsten
     Type:  task      |         Status:  new    
 Priority:  normal    |      Milestone:         
Component:  Analysis  |        Version:         
 Keywords:            |         Parent:         
   Points:            |   Actualpoints:         
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 At the Florence hackfest I was asked for the typical number of AES/RSA
 operations performed by a relay or bridge, say, per day.  This information
 is relevant, e.g., for designing the hardware capabilities of a Torouter
 device.

 Here's my plan to find out:

  - We can easily derive the number of AES operations by looking at the
 total traffic pushed by relays and bridges.  Extra-info descriptors
 contain bandwidth histories that we could use here.  If we assume 1 AES
 operation per 16 written or read bytes, we should be quite close to
 reality.

  - Nick suggested to send a USR1 signal to a tor process to write lines
 like this to their log (this line comes from a client):

  `Jul 10 18:31:22.904 [info] PK operations: 0 directory objects signed, 0
 directory objects verified, 0 routerdescs signed, 2968 routerdescs
 verified, 216 onionskins encrypted, 0 onionskins decrypted, 30 client-side
 TLS handshakes, 0 server-side TLS handshakes, 0 rendezvous client
 operations, 0 rendezvous middle operations, 0 rendezvous server
 operations.`

  We could ask a few friendly relay and bridge operators on tor-talk to
 tell us the number of encrypted and decrypted onionskins together with the
 fingerprint.  We can then look at the uptime of that relay or bridge in
 the descriptor archives and compute the average number of operations per
 day.

 Is there an easier way to find out how many AES/RSA operations a relay or
 bridge does per day?

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/6369>
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