Certco, Inc.
25Patents
3Active
25Granted
38Portfolio score
Filing activity: Sep 12, 1995 → Jan 24, 2012 · 2 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6029150A | Payment and transactions in electronic commerce system | Physics | 782 | Expired |
| US5903882A | Reliance server for electronic transaction system | Emerging Cross-Sectional Technologies | 475 | Expired |
| US5659616A | Method for securely using digital signatures in a commercial cryptographic system | Electricity | 454 | Expired |
| US6009177A | Enhanced cryptographic system and method with key escrow feature | Physics | 345 | Expired |
| US5799086A | Enhanced cryptographic system and method with key escrow feature | Physics | 311 | Expired |
| US5995625A | Electronic cryptographic packing | Physics | 212 | Expired |
| US5867578A | Adaptive multi-step digital signature system and method of operation thereof | Electricity | 207 | Expired |
| US6209091A | Multi-step digital signature method and system | Physics | 162 | Expired |
| US5841865A | Enhanced cryptographic system and method with key escrow feature | Physics | 151 | Expired |
| US5872849A | Enhanced cryptographic system and method with key escrow feature | Physics | 109 | Expired |
| US5850451A | Enhanced cryptographic system and method with key escrow feature | Physics | 99 | Expired |
| US6411716B1 | Method of changing key fragments in a multi-step digital signature system | Electricity | 99 | Expired |
| US7177839B1 | Reliance manager for electronic transaction system | Physics | 85 | Expired |
| US5857022A | Enhanced cryptographic system and method with key escrow feature | Physics | 82 | Expired |
| US6035041A | Optimal-resilience, proactive, public-key cryptographic system and method | Electricity | 67 | Expired |
| US7904722B2 | Method for securely using digital signatures in a commercial cryptographic system | Electricity | 28 | Active |
| US6237097A | Robust efficient distributed RSA-key generation | Emerging Cross-Sectional Technologies | 27 | Expired |
| US6353812B2 | Computer-based method and system for aiding transactions | Physics | 25 | Expired |
| USRE36918E | Fair cryptosystems and methods of use | General | 22 | Expired |
| US7184988B1 | Methods for operating infrastructure and applications for cryptographically-supported services | Physics | 20 | Expired |
| US8032743B2 | Reliance server for electronic transaction system | Emerging Cross-Sectional Technologies | 9 | Expired |
| US7343346B2 | Computer-based method and system for aiding transactions | Physics | 5 | Expired |
| US7610614B1 | Cryptographic control and maintenance of organizational structure and functions | Electricity | 4 | Expired |
| US8321348B2 | Computer-based method and system for aiding transactions | Physics | 2 | Active |
| US8121949B2 | Computer-based method and system for aiding transactions | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.