PGP Holdings, LLC
9Patents
2Active
9Granted
34Portfolio score
Filing activity: Oct 28, 1999 → Dec 3, 2018 · 1 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6662299B1 | Method and apparatus for reconstituting an encryption key based on multiple user responses | Physics | 125 | Expired |
| US7139399B1 | Cryptographic system with methods for user-controlled message recovery | Electricity | 80 | Expired |
| US7640427B2 | System and method for secure electronic communication in a partially keyless environment | Electricity | 78 | Expired |
| US6851049B1 | Method and apparatus for facilitating secure anonymous email recipients | Electricity | 74 | Expired |
| US7657037B2 | Apparatus and method for identity-based encryption within a conventional public-key infrastructure | Electricity | 38 | Active |
| US7383439B2 | Apparatus and method for facilitating encryption and decryption operations over an email server using an unsupported protocol | Electricity | 36 | Expired |
| US6978025B1 | Method and apparatus for managing public keys through a server | Electricity | 25 | Expired |
| US7054447B1 | Method and apparatus for periodically removing invalid public keys from a public key server | Electricity | 22 | Expired |
| US10668864B2 | Automobile roof cargo mounting device | Performing Operations; Transporting | 0 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.