An analog speech scrambling system using the FFT technique with high-level security.
Akira MatsunagaKeiichiro KogaMichihisa OhkawaPublished in: IEEE J. Sel. Areas Commun. (1989)
Keyphrases
- high level
- low level
- image scrambling
- speech recognition
- frequency domain
- intrusion detection
- higher level
- fourier transform
- security policies
- security protocols
- security issues
- speech signal
- information security
- security requirements
- access control
- lower level
- text to speech
- low level features
- statistical databases
- fast fourier transform
- audio visual
- security mechanisms
- security analysis
- semantic information
- image encryption
- fourier transformation