Recommendation 15 (Internet Voting) Switzerland 2011
http://www.osce.org/odihr/87426
It is recommended that all cantons adhere to good practice when handling cryptographic material, which provide that the private key be generated at a public meeting and that the key be divided in separate parts and shared by at least two people who are unlikely to collude. Preferably, this key should be generated and stored using secure cryptographic media (such as a smartcard). Essential procedures, such as the decryption of internet votes, could also take place at public meetings.