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3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 6088799 | Security method and system for persistent storage and communications on computer network systems and computer network systems employing the same A process is described in which a user enters ID and password information at a network client computer terminal. This information is combined with an asymmetric key stored in a persistent storage directly accessible to the client's computer terminal. This... | 07/11/2000 |
| 6076077 | Data management system A system for dealing in an original data content and an edited data content. A data content is handled as an object, and the data content is edited by editing a data content, functioning as an object, in accordance with an edit program. The edited data co... | 06/13/2000 |
| 6073235 | Private broadcast communication system and method for private broadcast communication over a wired or wireless network A private broadcasting system includes communication terminals which are coupled to both a broadcasting network and point-to-point network. A private broadcasting device included in the broadcasting system is coupled to a database that contains a pool of ... | 06/06/2000 |
| 6069952 | Data copyright management system A data copyright management system comprises a database for storing original data, a key control center for managing crypt keys, copyright management center for managing data copyrights, and a communication network for connecting these sections. Data supp... | 05/30/2000 |
| 6058193 | System and method of verifying cryptographic postage evidencing using a fixed key set A method for controlling keys used in the verification of encoded information generated by a transaction evidencing device and printed on a document comprises the steps of generating a plurality of random verifier master keys to obtain a set of verifier m... | 05/02/2000 |
| 6052467 | System for ensuring that the blinding of secret-key certificates is restricted, even if the issuing protocol is performed in parallel mode A cryptographic method is disclosed that enables the issuer in a secret-key certificate issuing protocol to issue triples consisting of a secret key, a corresponding public key, and a secret-key certificate of the issuer on the public key, in such a way t... | 04/18/2000 |
| 6049878 | Efficient, secure multicasting with global knowledge A system for secure multicast including at least one sending entity operating on a sending computer system, the sending entity with a sending multicast application running on the sending computer system. A number of receiving entities each running on a re... | 04/11/2000 |
| 6041408 | Key distribution method and system in secure broadcast communication A key distribution method and system are disclosed in which a sender and receivers share a common key information for performing a secure broadcast communication. By use of a center side apparatus, a center generates key information of a receiver in assoc... | 03/21/2000 |
| 6038322 | Group key distribution A method for distributing a secret key from a key holder H to intended group members M. The method assumes that during the distribution process each party, a group member M and the key holder H, can decrypt and encrypt exchanged information such that the ... | 03/14/2000 |
| 6021391 | Method and system for dynamic data encryption In a method and system for dynamic data encryption, a source data provider is used to provide a plurality of source data segments, while a segment header generator is employed to generate a plurality of segment headers that correspond respectively to the ... | 02/01/2000 |
| 6002772 | Data management system To prevent piracy or leakage of data content, a cryptography technique and electronic watermark technique are combined together and used. In a data content supplied to a user, a user data is entered as electronic watermark by a data management center, and... | 12/14/1999 |
| 6002694 | Interactive chargeable communication system with billing system therefor A billing system for use in a chargeable program broadcasting is capable of reliably billing a subscriber for program reception while preventing unauthorized reception thereof. A receiving terminal includes a primary terminal 100 and a secondary terminal ... | 12/14/1999 |
| 6003136 | Message control system for managing message response in a kerberos environment A Kerberos domain network enables multiple client-terminals to communicate with one or more client-servers and a Kerberos Server. A request for Kerberos service by a requesting client-terminal is managed by a communication management system program (COMS)... | 12/14/1999 |
| 5999623 | Broadcast data access controller communication system Disclosed is a method and apparatus for enabling an authorized receiver station to decrypt encrypted information broadcast by a transmitter station, and for decrypting the information within the authorized receiver station. The method includes steps of st... | 12/07/1999 |
| 5991399 | Method for securely distributing a conditional use private key to a trusted entity on a remote system Secure distribution of a private key to a user's application program (also called a "trusted player" such as a DVD player or CD-ROM player) with conditional access based on verification of the trusted player's integrity and authenticity is provided. Once ... | 11/23/1999 |
| 5987129 | Method of sharing cryptokey In a center, a Fourier transformation with a weighting function and a center matrix are applied to the identifier of each entity (steps 2-1, 2-2), which is then randomized by one-time pass random number data generated by a manual operation at each entity,... | 11/16/1999 |
| 5987128 | Method of effecting communications using common cryptokey For effecting cryptographic communications between entities i, j using a common cryptokey, each of the entities i, j generates a common cryptokey by applying an identifier transformation algorithm and a secret private key, which have previously been distr... | 11/16/1999 |
| 5982892 | System and method for remote authorization for unlocking electronic data A system and method for controlling unauthorized access to software distributed to a user by a vendor in which a verification key is generated by a product key generator and either embedded in the software prior to distribution or packaged with the softwa... | 11/09/1999 |
| 5966443 | Method for correcting subscriber-based secure call keys A key variable correction scheme allows errored encryption key material in mobile and portables radios to be quickly identified and corrected. The errored encryption material can be corrected automatically by a key management controller, once detected. Co... | 10/12/1999 |
| 5966449 | Method and network for communicating between a group of entities a text encrypted using an encryption key intrinsic to the group of entities in a network having a plurality of entities and a center In a network having a plurality of entities and a center, the center creates random numbers for all the combinations of two of the entities within the network, and delivers to each entity random numbers created for those combinations involving that entity... | 10/12/1999 |
| 5956406 | Method of setting up secure communications and associated encryption/decryption system A method of establishing secure communication between users by means of a public key encryption/decryption system comprises the following steps: a center generates a pair of keys comprising a secret key and a public key, the center's public key is supplie... | 09/21/1999 |
| 5937164 | Method and apparatus of secure server control of local media via a trigger through a network for instant local access of encrypted data on local media within a platform independent networking system A method of triggering video imaging and/or audio data on a "HyperCD" (CD-ROM) via a trigger through a network for instant local access of encrypted data on local media. The CD-ROM contains video/audio files that have been crippled by removing the critica... | 08/10/1999 |
| 5905799 | Programmed computer for identity verification, forming joint signatures and session key agreement in an RSA public cryptosystem An article of manufacture for improving an RSA cryptosystem, includes computer readable storage medium with computer programming stored thereon. The stored computer programming is configured to be readable from the computer readable storage medium by a co... | 05/18/1999 |
| 5870473 | Electronic transfer system and method A system and method relating to secure communications in a communication network is disclosed. The invention uses sessions having limited duration to enable parties to communicate securely in the communication network. The session of one party is independ... | 02/09/1999 |
| 5864667 | Method for safe communications Disclosed is a method for safe distribution of encryption keys including a known public and secret private keys in establishing a secure link between computer users resided at separate location whom have no previous secure communications. The secure commu... | 01/26/1999 |
| 5862220 | Method and apparatus for using network address information to improve the performance of network transactions An apparatus and method for using network address information to improve the performance and increase the functionality of network transactions. is disclosed. In a client network interface device having a processor and a memory coupled to the processor, t... | 01/19/1999 |
| 5848158 | Data copyright management system A data copyright management system is provided, in which a primary user edits a received data and supplies the edited data to a secondary user. The copyright management system comprises a database and a key control center, and uses a primary copyright lab... | 12/08/1998 |
| 5832086 | Method for updating a communication unit parameter in a wireless communication system In one embodiment of the present invention, an update method preference value (401) is determined as between a group update method and an individual update method for a wireless communication system (100). Also, a plurality of communication units are part... | 11/03/1998 |
| 5832092 | Communication system based on shared cipher key, server unit for the same system, client unit for the same system, and method of sharing cipher key in communication system A communication system which is capable of proper cipher communications with many and unspecific parties and of making all the entities share a common key and which does not require the change of its own secret information even if the public information i... | 11/03/1998 |
| 5825300 | Method of protected distribution of keying and certificate material A computer system and a method for the protected distribution of certificate and keying material between a certification authority and at least one entity in the certification authority's domain, including the steps of sending keying material, including a... | 10/20/1998 |
| 5825889 | Use of duplex cipher algorithms for satellite channels with delay An apparatus and method for ciphering traffic exachanged in both directions between a satellite/cellular telephone and a ground station networkusing an orbitial satellite. A buffer memory is provided at either the mobile telephone station or the ground ne... | 10/20/1998 |
| 5809140 | Session key distribution using smart cards Methods and apparatus are disclosed for providing secure session key distribution using a smart circuit card or other intelligent device. First and second hosts communicate with each other and with a server over a communication network. The first host ini... | 09/15/1998 |
| 5787172 | Apparatus and method for establishing a cryptographic link between elements of a system A secure cryptographic network is established among operational units in a system. A public key cryptosystem is initially used to establish secure communication links. Then, each secure communication link will be provided with a unique private encryption ... | 07/28/1998 |
| 5778065 | Method and system for changing an authorization password or key in a distributed communication network A robust and secure password (or key) change method between a user and an authentication server in a distributed communication network is disclosed. The protocol requires the exchange of only two messages between the user desiring the key change and the s... | 07/07/1998 |
| 5768380 | Method for sending a communication unit parameter to a plurality of communication units In a wireless communication system (100), a communication unit parameter is sent to a plurality of communication units (105-108) during a first period of time using either a group update method or an individual update method (401). A first set of communic... | 06/16/1998 |
| 5701343 | Method and system for digital information protection A digital information protection scheme using an improved security protocol. In a system in which a user makes an access to a digital information provided by an information center by connecting a computer card owned by the user to an information terminal ... | 12/23/1997 |
| 5696823 | High-bandwidth encryption system with low-bandwidth cryptographic modules A cryptographic system enables a secure, but low-bandwidth, cryptographic module, such as a smartcard or PCMCIA device, to serve as a high-bandwidth secret-key encryption decryption engine which uses the processing power of an untrusted, but fast, host pr... | 12/09/1997 |
| 5680458 | Root key compromise recovery A method of recovering from a compromise of a root key which is the private key of a first public key-private key pair, the method including the steps of electronically sending out an emergency message indicating that the root key has been compromised and... | 10/21/1997 |
| 5677954 | Cryptical control method for personal communication When an incoming call corresponding to a communication number PID takes place in a switching station, the switching station retrieves user-intrinsic information UK and an incoming-communication registered terminal identification number SID and sends the c... | 10/14/1997 |
| 5671285 | Secure communication system Encryption/decryption capable terminal units, such as FAX point-of-sale units, on non-secure telecommunications, use public keys for accessing selected target terminals, but make their messages secure by encryption according to private keys. Each subscrib... | 09/23/1997 |
