信息安全 安全协议与分析技术 释文 trusted timestamp 可信时间戳
- signal-to-noise ratio
- signal-to-noise ratio，SNR
- signal transduction
- signal transduction in plants
- signal transfer equalization
- signal transform
- signal transmission
- signal transmission failure
- signal velocity
- signal voltage drop
- signal waveform estimation
- signal with finite energy
- signal with finite power
- signalyzer
- signatron
- signature
- signature analyzer
- signature-based detection
- signature block
- signature certificate
- signature criterion
- signature file
- signature inversion
- signature of a group
- signature of a knot