Bull CP8
40Patents
0Active
40Granted
39Portfolio score
Filing activity: Dec 30, 1986 → Oct 10, 2001
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5533126A | Key protection device for smart cards | Electricity | 307 | Expired |
| US5479509A | Method for signature of an information processing file, and apparatus for implementing it | Physics | 230 | Expired |
| US5442645A | Method for checking the integrity of a program or data, and apparatus for implementing this method | Physics | 211 | Expired |
| US4825052A | Method and apparatus for certifying services obtained using a portable carrier such as a memory card | Physics | 173 | Expired |
| US4907270A | Method for certifying the authenticity of a datum exchanged between two devices connected locally or remotely by a transmission line | Electricity | 121 | Expired |
| US5867577A | Method and apparatus for authenticating a data carrier intended to enable a transaction or access to a service or a location, and corresponding carrier | Physics | 121 | Expired |
| US5434999A | Safeguarded remote loading of service programs by authorizing loading in protected memory zones in a terminal | Physics | 118 | Expired |
| US4795893A | Security device prohibiting the function of an electronic data processing unit after a first cutoff of its electrical power | Physics | 115 | Expired |
| US5528231A | Method for the authentication of a portable object by an offline terminal, and apparatus for implementing the process | Electricity | 114 | Expired |
| US6568600B1 | Chip card equipped with a loop antenna, and associated micromodule | Emerging Cross-Sectional Technologies | 105 | Expired |
| US4907272A | Method for authenticating an external authorizing datum by a portable object, such as a memory card | Electricity | 105 | Expired |
| US5566323A | Data processing system including programming voltage inhibitor for an electrically erasable reprogrammable nonvolatile memory | Physics | 100 | Expired |
| US6658566B1 | Process for storage and use of sensitive information in a security module and the associated security module | Electricity | 90 | Expired |
| US5796835A | Method and system for writing information in a data carrier making it possible to later certify the originality of this information | Physics | 84 | Expired |
| US4980802A | Flexible printed circuit | Electricity | 40 | Expired |
| US6751671B1 | Method of communication between a user station and a network, in particular such as internet, and implementing architecture | Electricity | 34 | Expired |
| US6657956B1 | Method enabling secure access by a station to at least one server, and device using same | Electricity | 30 | Expired |
| US6658569B1 | Secret key cryptographic process for protecting a computer system against attacks by physical analysis | Emerging Cross-Sectional Technologies | 30 | Expired |
| US5177790A | Method for generating a random number in a data processing system/and system for implementing the method | Physics | 29 | Expired |
| US6839849B1 | Smart integrated circuit | Physics | 28 | Expired |
| US5097117A | Electronic microcircuit card and method for its manufacture | Electricity | 26 | Expired |
| US5815083A | Process for entry of a confidential piece of information and associated terminal | Physics | 24 | Expired |
| US5341421A | Security device, including a memory and/or a microcomputer for data processing machines | Physics | 22 | Expired |
| US5365466A | Method for generating a random number in a system with portable electronic objects, and system for implementing the method | Physics | 18 | Expired |
| US6735627B2 | System and method of smart card for managing transmissions of multimedia data via an internet-type network, in particular telephone or videophone data, between subscriber systems | Electricity | 17 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.