Tricipher, Inc.

Singlesigon. Net Inc.

Karuna Ganesan

Colin Joseph deSa

Ravi Sandhu

A user has two asymmetric crypto-keys, the first having a first private key and the second having a second private key, both of which are split into a first private key portion corresponding to a password of the user and to a computation. However, the computation of the first private key portion of the first and the second private keys have different levels of complexity. First and second messages from the user encrypted with the first private key portion of, respectively, the first private key and the second private key, are received centrally. A second private key portion of, respectively, the first private key and the second private key is applied to the received first and the received second messages, as applicable, to authenticate the user at, respectively, a first level of authentication security and a second level of authentication security which is greater than the first level.

Laddered authentication security using split key asymmetric cryptography

A method and system for generating asymmetric crypto-keys usable by network users to transform messages is provided. The system includes a first network station associated with a user, a second network station associated with a trusted entity, and a third network station associated with a sponsor. The trusted entity authorizes the sponsor to generate the asymmetric crypto-key. The sponsor generates a symmetric crypto-key and associated user identification. The sponsor both stores the generated symmetric crypto-key and the associated user identification and transmits the symmetric crypto-key and the associated user identification to the trusted entity. The trusted entity then distributes the symmetric crypto-key and user identification to the user. The user then presents the user identification to the sponsor. The sponsor then generates a challenge and transforms the challenge with the stored symmetric crypto-key. The sponsor transmits the transformed challenge to the user. The user then further transforms the challenge and transmits the further transformed challenge back to the sponsor. In response to receipt of the further transformed challenge, the sponsor then generates the asymmetric crypto-key.

Method and system for authorizing generation of asymmetric crypto-keys

A system for authentication of a crypto-system user by the use of both symmetric and asymmetric crypto-keys is provided. A first network station, representing the user, transmits a first request for authentication to a second network station. The second station generates a shared symmetric crypto-key, encrypts it and forwards it to both the first station and a third network station. The third station encrypts the received shared symmetric crypto-key and forwards it to the first network station. The first network station combines the two instances of the received and encrypted shared symmetric crypto-key, decrypts the combined symmetric crypto-key to recover shared symmetric crypto-key, encrypts a second authentication request with the recovered shared symmetric crypto-key, and transmits the encrypted authentication request to authenticate the first station. Each transmission of the shared symmetric crypto-key is encrypted with different portion of different ones of multiple asymmetric crypto-keys, each associated with a network station.

System and method for authentication in a crypto-system utilizing symmetric and asymmetric crypto-keys

A system for authentication of network users which is operable in multiple modes, includes a plurality of user network stations and at least one sponsor network station representing a sponsor. Each network station represents a user associated with an asymmetric crypto-key having either a first or second number of private portions, the second number being greater than the first number. The one or more sponsor network stations receive authentication requests from the user network stations, determine the identity of a user associated with each of the received authentication requests, select from two or more available modes of operation based upon the determined identity. If operation in one mode is selected, the sponsor network station signs a particular received authentication request using one private portion of an asymmetric crypto-key having a first number of private portions. However, if another mode is selected, the sponsor network station signs that particular authentication request using one private portion of an asymmetric crypto-key having a second number of private portions.

System and method for generation and use of asymmetric crypto-keys each having a public portion and multiple private portions

A system for accessing multiple different network stations without entry of a password is provided. The password is obtainable by use of a portion of an asymmetric crypto-key. A first station, representing any network entity, transmits an authentication request of a user seeking access. A second station, representing the user, forwards the request and user identity information to a third station. The third station, representing a sponsor, matches the transmitted identity information with stored identity information, generates a certificate, and transmits the certificate. The second station further transmits the certificate to the first station. To provide the password, each of the stations encrypt and decrypt messages utilizing different ones of an asymmetric crypto-key having a public key portion and first and second private key portions, the first private portion used to obtain the password, first and second symmetric crypto-keys, and a combination symmetric crypto-key corresponding to the first symmetric crypto-key.

One time password entry to access multiple network sites

A communications network is provided for securing communications and updating user identity information. A symmetric crypto-key, an asymmetric crypto-key having first and second private key portions and a public key portion, and a certificate are utilized. A first network station, representing any network entity, transmits a user authentication request. A second network station, representing the user, forwards, either jointly or separately, the request and user identity information to a third network station. The third network station, representing a sponsor, matches the transmitted identity information with stored identity information, modifies the stored identity information to correspond to the received identity information, generates a certificate including the modified identity information, and transmits the certificate and the request. The second station further transmits the certificate to the first station. The stations encrypt and decrypt messages utilizing different ones of the symmetric crypto-key and the portions of the asymmetric crypto-key to secure communications.

Secure communications network with user control of authenticated personal information provided to network entities

A first processor generates a private crypto-key and a public crypto-key. The first processor divides the private crypto-key into two portions, a first private key portion, based upon a user's password, and a second private key portion. The private crypto-key and the first private key portion are then destroyed. The remaining portion, second private key portion, and the public crypto-key are stored in a memory. A second processor generates the first private key portion based upon the user's password and responsive to receiving the user's password. The second processor then destroys the generated first private key portion with out storing the generated first private key portion.

System and method for crypto-key generation and use in cryptosystem

A network device represents a user having a predefined associated password, a predefined associated symmetric crypto-key and a predefined associated asymmetric crypto-key, including a first private key portion, a second private key portion and a public key portion. The device includes a memory, input device and processor. The memory stores a function. The input device allows the inputting of the user password. The processor operates in either a first or second mode of operation. In the first mode of operation, the processor processes the input password in accordance with the stored function to generate the associated first private key portion, and encrypts and/or decrypts or signs a message with the generated first private key portion. In a second mode of operation, the processor processes the input password in accordance with the same stored function to generate the associated symmetric crypto-key, and encrypts and/or decrypts and/or authenticates a message with the generated symmetric crypto-key.

High security cryptosystem

A method for authenticating a user includes receiving a request for access from a user claiming to be a particular user. A first challenge having a first level of complexity is transmitted to the user. A response to the transmitted first challenge is transmitted. A determination is made as to whether or not the transmitted response authenticates the user as the particular user. The requested access by the user is allowed if the transmitted response authenticates the user. However, a second challenge having a second level of complexity, greater than the first level of complexity, is transmitted to the user if the transmitted response does not authenticate the user.

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Norcross, GA, United States of America

Karuna Ganesan