Dave Kleiman (22 January 1967 – 26 April 2013)[1] was an American computer forensics expert, an author or co-author of multiple books and a frequent speaker at security related events.

Kleiman died in his home in late April 2013, seemingly of natural causes related to complications from a MRSA infection.

Some of Kleiman's most notable work took place at S-doc (Securit-e-doc, [8]) where his role was Chief Information Security Officer.

Cryptography was routinely used at S-doc to develop several products, broadly aimed at the reliable and verifiable transmission of data and messages, centered around the idea of an "unalterable, encrypted audit log system".

[4][11] The estate alleged that Kleiman was one of the early bitcoin pioneers and worked with Craig Steven Wright on its establishment as a cryptocurrency.