"There's just so much more potential when searching a cell phone or an e-mail archive, to uncover information that has no relevance to the object of the search, but yet could reveal many private and personal matters, " Silverstein says.
He led the development of the Open Library, a project of the Internet Archive that seeks to gather information about every book ever published in one place.
Swartz, 26, hanged himself in New York City in January as he faced trial on charges he hacked into the JSTOR archive of scholarly articles at MIT with the aim of making the information freely available.