Keyphrases
- spam filtering
- enron email
- communication medium
- fragile watermarking
- identity authentication
- text mining
- instant messaging
- security analysis
- image authentication
- biometric authentication
- security mechanisms
- user authentication
- integrity verification
- spam detection
- anti spam
- email messages
- identity management
- authentication scheme
- electronic mail
- biometric data
- data encryption
- authentication mechanism
- spam emails
- pre classified
- email classification
- data collection