CODEX_KeyService::VerifiableBlindKeyMsg Class Reference

CODEX_Client::BlindKeyMsg decorated with a proof of correctness. More...

#include <VerifiableBlindKeyMsg.h>

Inheritance diagram for CODEX_KeyService::VerifiableBlindKeyMsg:

[legend]Collaboration diagram for CODEX_KeyService::VerifiableBlindKeyMsg:

[legend]List of all members.

Public Types
typedef CODEX_Server::ServerState::ShareType::ValueType	ValueType
	The base type of partial results.
typedef CODEX_Server::ServerState::LSType::LabelType	LabelType
	The type of a sharing label.
typedef CODEX_ThresholdCrypto::DLProof	DLProof
	The type of a single-result proof.
typedef CODEX_Client::CipherTextType	CipherTextType
	The type of a ciphertext.
typedef CODEX_Client::BlindCipherTextType	BlindCipherTextType
	The type of a blind ciphertext.
typedef CODEX_Client::BlindPlainTextType	BlindPlainTextType
	The type of a blind plaintext.
Public Member Functions
	VerifiableBlindKeyMsg ()
	Default constructor, for creating an object to be unmarshalled.
	VerifiableBlindKeyMsg (const CODEX_ASN1::OctetString &name, const BlindPlainTextType &blindedKey, const CODEX_Ciphers::RSASignature &requestSignature, const BlindCipherTextType &blindCipher)
	Create a VerifiableBlindKeyMsg from the basic components.
	VerifiableBlindKeyMsg (const VerifiableBlindKeyMsg &aBKM)
	Create a VerifiableBlindKeyMsg from another VerifiableBlindKeyMsg.
virtual	~VerifiableBlindKeyMsg ()
	Virtual destructor.
void	operator= (const VerifiableBlindKeyMsg &aBKM)
	Assignment operator.
CODEX_Client::BlindKeyMsg	upcast () const
	Convert the object to its base class.
int	marshal (unsigned char **pp) const
	Serialize the message.
void *	unmarshal (void *bogus, unsigned char **pp, long length)
	Unserialize the message.
const BlindCipherTextType &	blindCipher () const
	The blinded ciphertext for which we have the decryption.
const CODEX_ASN1::OctetString &	name () const
	The name of the key.
const BlindPlainTextType &	blindedKey () const
	The blinded key.
const CODEX_Ciphers::RSASignature &	requestSignature () const
	The client's signature from the read request.
BIGNUM *	digest (const CODEX_Ciphers::HashFunction &hf) const
	Create a message digest.
bool	initialized () const
Static Public Attributes
static const unsigned int	NumProofs = CODEX_Server::ServerState::ShareType::NumShares
	The number of proofs.
Protected Attributes
bool	m_initialized
	Has this object been initialized yet, or is it still blank?

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Detailed Description

CODEX_Client::BlindKeyMsg decorated with a proof of correctness.

Blind threshold decryption must be verifiable. In the case of a deterministic encryption scheme, such as RSA, combinatorics suffice to determine if an alleged plaintext is the decryption of the ciphertext. For ElGamal, which is non-deterministic encryption, this is not feasible (according to the Decision Diffie-Hellman Assumption, which is the basis for the cryptosystem's security). Instead, we must provide a separate proof that each partial result is a correct computation. These proofs are encapsulated in this class.

Definition at line 42 of file VerifiableBlindKeyMsg.h.

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Member Function Documentation

bool CODEX_ASN1::Base::initialized (   )  const [inline, inherited]

Returns: Has this object been initialized? Definition at line 175 of file Base.h. References CODEX_ASN1::Base::m_initialized. Referenced by CODEX_APSS::SecretManagement::addComputeMsg(), CODEX_APSS::SecretManagement::addEstablishMsg(), CODEX_APSS::SecretManagement::addEstablishResponse(), CODEX_APSS::SecretManagement::addInitMsg(), CODEX_APSS::SecretManagement::addSharing(), CODEX_APSS::SecretManagement::addSubsharing(), CODEX_VSS::Combinatoric< NumT, ThreshT >::apply(), CODEX_Server::ServerState::caKey(), CODEX_KeyService::ClientCreateCallback::ClientCreateCallback(), CODEX_VSS::Combinatoric< NumT, ThreshT >::count(), CODEX_Server::QuorumBuilderAct::handler(), CODEX_APSS::MessageVerifier::handler(), CODEX_KeyService::DelegateResponseVerifier::handler(), CODEX_KeyService::DelegateRequestDistributor::handler(), CODEX_KeyService::ClientMessageVerifier::handler(), CODEX_KeyService::ClientMessageSigner::handler(), CODEX_VSS::SubshareLabel< LabelType >::marshal(), CODEX_KeyService::KeyInfo::marshal(), CODEX_VSS::LabeledShare< ShareType, OneWay >::marshal(), CODEX_VSS::ShareLabel< _ShareType, _OneWay >::marshal(), CODEX_VSS::ModExpFunctionalArgs::marshal(), CODEX_VSS::Combinatoric< NumT, ThreshT >::marshal(), CODEX_KeyService::SignWriteCallback::operator()(), CODEX_KeyService::SignReadCallback::operator()(), CODEX_KeyService::SignCreateCallback::operator()(), CODEX_VSS::ModExpFunctional::operator()(), CODEX_KeyService::ClientReadCallback::operator()(), CODEX_KeyService::ClientCreateCallback::operator()(), CODEX_VSS::Combinatoric< NumT, ThreshT >::operator+=(), CODEX_Server::ServerState::readElGamalShares(), CODEX_VSS::Combinatoric< NumT, ThreshT >::recover(), CODEX_APSS::SecretManagement::sendFinished(), CODEX_Server::ServerState::serviceKey(), CODEX_Server::ServerState::setEGShareCallback(), and CODEX_Server::ServerState::setRSAShareCallback().

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The documentation for this class was generated from the following files:

• VerifiableBlindKeyMsg.h
• VerifiableBlindKeyMsg.cc

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