On Saturday, the 24th, 11am-1pm, several computer privacy/security activists will show how you can protect your privacy on-line. It will be at the South Boston Boston Public Library Branch, 646 East Broadway.
The monthly Somerville Cryptoparty will be Wednesday, the 28th, from 6pm-9pm. It will likely be at Sprout & Co, 339R Summer St, Somerville. The building is in the rear of the driveway.
To find out about upcoming cryptoparties, visit https://www.cryptoparty.in/boston.