Abstract: A notarization method is disclosed whereby two parties can transmit and exchange electronic data without sharing either the data or any proprietary security information with third parties, and whereby the receiving party cannot surreptitiously examine the data without creating a logged record. In a preferred embodiment, the sending party uses an encryption algorithm to encrypt the data package, generating an encrypted copy of the data and a session key that can be used to retrieve the plaintext copy of that data package. The session key is split into two or more discrete subkeys, some or all of which are required to reconstruct the session key, and none of which alone will compromise the other subkeys or the data package. Using secure transport methods, the encrypted data packet and one or more subkeys are delivered to the intended recipient. The remaining subkeys are either retained by the sending party or delivered to a trusted third party using secure transport methods.