Keyphrases
- electronic commerce
- transaction costs
- trusted third party
- third party
- seller agents
- lightweight
- digital images
- watermarking scheme
- tcp ip
- spread spectrum
- fragile watermarking
- copyright protection
- multi party
- communication protocol
- image watermarking
- formal analysis
- sealed bid
- supply chain
- security protocols
- electronic marketplaces
- key distribution
- decision process
- image authentication
- online auctions
- software agents