Entrust Technologies Limited
49Patents
0Active
49Granted
37Portfolio score
Filing activity: Sep 28, 1995 → Jun 28, 2001
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6442688B1 | Method and apparatus for obtaining status of public key certificate updates | Physics | 346 | Expired |
| US6341164B1 | Method and apparatus for correcting improper encryption and/or for reducing memory storage | Electricity | 309 | Expired |
| US6363485B1 | Multi-factor biometric authenticating device and method | Electricity | 272 | Expired |
| US6092201A | Method and apparatus for extending secure communication operations via a shared list | Electricity | 248 | Expired |
| US5850443A | Key management system for mixed-trust environments | Electricity | 244 | Expired |
| US6266420A | Method and apparatus for secure group communications | Electricity | 219 | Expired |
| US6202157A | Computer network security system and method having unilateral enforceable security policy provision | Electricity | 209 | Expired |
| US6229894A | Method and apparatus for access to user-specific encryption information | Physics | 194 | Expired |
| US6694434B1 | Method and apparatus for controlling program execution and program distribution | Physics | 185 | Expired |
| US6393568B1 | Encryption and decryption system and method with content analysis provision | Physics | 181 | Expired |
| US6134550A | Method and apparatus for use in determining validity of a certificate in a communication system employing trusted paths | Emerging Cross-Sectional Technologies | 173 | Expired |
| US6567914B1 | Apparatus and method for reducing transmission bandwidth and storage requirements in a cryptographic security system | Electricity | 158 | Expired |
| US6128740A | Computer security system and method with on demand publishing of certificate revocation lists | Electricity | 130 | Expired |
| US6317829A | Public key cryptography based security system to facilitate secure roaming of users | Electricity | 124 | Expired |
| US6370249B1 | Method and apparatus for public key management | Electricity | 120 | Expired |
| US6507911B1 | System and method for securely deleting plaintext data | Physics | 119 | Expired |
| US6108788A | Certificate management system and method for a communication security system | Electricity | 117 | Expired |
| US6192130A | Information security subscriber trust authority transfer system with private key history transfer | Electricity | 107 | Expired |
| US6134327A | Method and apparatus for creating communities of trust in a secure communication system | Electricity | 103 | Expired |
| US6470450B1 | Method and apparatus for controlling application access to limited access based data | Physics | 85 | Expired |
| US6603857B1 | Method and apparatus for controlling release of time sensitive information | Electricity | 83 | Expired |
| US5968177A | Method and apparatus for processing administration of a secured community | Physics | 80 | Expired |
| US6336121B1 | Method and apparatus for securing and accessing data elements within a database | Emerging Cross-Sectional Technologies | 79 | Expired |
| US6574733B1 | Centralized secure backup system and method | Physics | 78 | Expired |
| US6393565B1 | Data management system and method for a limited capacity cryptographic storage unit | Electricity | 71 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.