摘要:
A system for detecting and preventing replay attacks includes a plurality of interconnected authentication servers, and one or more tokens for generating a one-time passcode and providing the one-time passcode to one of the authentication servers for authentication. The system includes an adjudicator function associated with each authentication server. The adjudicator evaluates a high water mark value associated with a token seeking authentication, allows authentication to proceed for the token if the high water mark evaluation indicates that the one-time passcode was not used in a previous authentication, and prevents authentication if the high water mark evaluation indicates that the one-time passcode was used in a previous authentication. The token is associated with a home authentication server that maintains a current high water mark of the token. The home authentication server validates the current high water mark on behalf of the adjudicator function evaluating the token for authentication.
摘要:
A system for detecting and preventing replay attacks includes a plurality of interconnected authentication servers, and one or more tokens for generating a one-time passcode and providing the one-time passcode to one of the authentication servers for authentication. The system includes an adjudicator function associated with each authentication server. The adjudicator evaluates a high water mark value associated with a token seeking authentication, allows authentication to proceed for the token if the high water mark evaluation indicates that the one-time passcode was not used in a previous authentication, and prevents authentication if the high water mark evaluation indicates that the one-time passcode was used in a previous authentication. The token is associated with a home authentication server that maintains a current high water mark of the token. The home authentication server validates the current high water mark on behalf of the adjudicator function evaluating the token for authentication.
摘要:
A method includes engaging in authentication operations each involving apparent use of a legitimate authenticator. Values of one or more authenticator variables are received and stored, where the authenticator variable(s) normally change in a known authenticator-specific way during the authentication operations, such as being calculated from a monotonically increasing dynamic variable. A risk analysis function is applied to the stored values to generate a risk indicator signal indicating a level of risk that the clone authenticator is in use. The risk analysis function includes detection of an abnormal change of the authenticator variable(s), such as use of non-monotonic dynamic variable values. The risk indicator signal is output to an access controller that operates, based on the level of risk indicated by the risk indicator signal, to selectively inhibit an otherwise successful authentication operation involving apparent use of the legitimate authenticator.
摘要:
A technique of message-passing using shared memory of an RF tag involves storing a message in the shared memory while a security processor of the RF tag is in a sleep mode, the security processor being constructed and arranged to access the shared memory when the security processor is in a wakened mode. The technique further involves transitioning the security processor from the sleep mode to the wakened mode, and processing the message from the shared memory using the security processor after the security processor has transitioned from the sleep mode to the wakened mode. If the security processor is awakened only as needed (rather than remain in the wakened mode), lifetime of a battery which powers the security processor can be maximized.
摘要:
A method and system for use in distributing token records is disclosed. At least one token record comprises a unique seed associated with a one-time password (OTP) token. An encryption key and a corresponding decryption key are generated for assisting selective encryption and decryption of a token record associated with a OTP token. The encryption key and the decryption key being unique to an end user of the token record. The token record is encrypted with the assistance of the encryption key. One of the decryption key and the encrypted token record is provided to the end user of the token record. The other of the decryption key and the encrypted token record is provided to the end user in response to secure receipt of the one of the decryption key and the encrypted token record by the end user. The encrypted token record can be decrypted with the assistance of the decryption key.
摘要:
Method and system for distributing token records in market environment is disclosed. At least one token record comprising a unique seed associated with a OTP token. Encryption key and decryption key are generated for assisting selective encryption and decryption of token record associated with OTP token. The token record is encrypted with the assistance of encryption key. One of encrypted token record and decryption key is provided into market environment. A device comprising an identifier for facilitating identification of token record associated with OTP token is provided into market environment together with the one of encrypted token record and decryption key. The identifier concealed by tamper-evident removable material such that any effort to reveal identifier will be readily apparent. The other of the encrypted token record and decryption key is provided to an entity in response to entity providing identifier.
摘要:
A method of generating authentication seeds for a plurality of users, the method involving: based on a single master seed, generating a plurality of derivative seeds, each one for a corresponding different one of a plurality of users; and distributing the plurality of derivative seeds to a verifier for use in individually authenticating each of the plurality of users to that verifier, wherein generating each one of the plurality of derivative seeds involves mathematically combining the master seed and a unique identifier identifying the corresponding user.
摘要:
A method of communicating within a system that includes a device, a controller for the device, a token, and a driver which implements a predefined interface for enabling communication with and/or control of the device through the controller, the method involving: via the predefined interface, receiving instructions and/or data at the controller from the driver for controlling the device; via the predefined interface, receiving at the controller a preselected control parameter indicating that communication with the token is desired; and in response to receiving the preselected control parameter, directing communications to the token.
摘要:
Techniques for secure generation of a seed for use in performing one or more cryptographic operations, utilizing a seed generation protocol carried out by a seed generation client (110c) and a seed generation server (110s). The seed generation server (110s) provides a first string to the seed generation client (110c). The seed generation client (110c) generates a second string, encrypts the second string utilizing a key (216), and sends the encrypted second string to the seed generation server (110s). The seed generation client (110c) generates the seed as a function of at leas the first string and the second string. The seed generation server (110s) decrypts the encrypted second string (222) and independently generates the seed as a function of at least the first string an the second string.
摘要:
In a system for disconnected authentication, verification records corresponding to given authentication token outputs over a predetermined period of time, sequence of events, and/or set of challenges are downloaded to a verifier. The records include encrypted or hashed information for the given authentication token outputs. In one embodiment using time intervals, for each time interval, token output data, a salt value, and a pepper value, are hashed and compared with the verification record for the time interval. After a successful comparison, a user can access the computer. A PIN value can also be provided as an input the hash function. A portion of the hash function output can be used as a key to decrypt an encrypted (Windows) password, or other sensitive information.