Abstract: A method for authenticating a user to a computer system is disclosed, comprising using a first input and a second input in producing a digital signature in response to a challenge. The digital signature is valid when the first input matches a personalized secret and the second input matches a trio comprising a public modulus, a public exponent, and a private-key-dependent exponent. Selection of the personalized secret is discretionary and changeable. A crypto-key generation process uses the personalized secret and two primes as input to produce the trio. The public modulus and public exponent of the trio form a public key used in digital signature validation. Also disclosed is a business method that replaces the conventional public-key certificate with an agreement on the user's public key.

Abstract: This patent application discloses techniques, devices and systems for user authentication based on linking between a randomly generated authentication secret and a personalized secret.

Abstract: Techniques and systems for protecting verifiable digital secrets such as encryption keys and identification codes based on partition and recovery processes are described. Implementations of the present techniques may be used, for example, to offer individuals a personalized tool for protecting secret data and to provide enhanced security. The partition and recovery may be carried out at the same computer or on separate computers.

Abstract: Several processes and techniques for creating cryptosystems are disclosed. Cryptosystems created accordingly use a personalized secret such as a user-chosen password as a private key and a trio consisting of a first public exponent, a second public exponent, and a modulus as a public key. The public key and the private key form a public/private key pair. Selection of the personalized secret is discretionary and uses no information about the public key.

Abstract: A method for authenticating a user to a computer system is disclosed, comprising using a first input and a second input in producing a digital signature in response to a challenge. The digital signature is valid when the first input matches a personalized secret and the second input matches a trio comprising a public modulus, a public exponent, and a private-key-dependent exponent. Selection of the personalized secret is discretionary and changeable. A crypto-key generation process uses the personalized secret and two primes as input to produce the trio. The public modulus and public exponent of the trio form a public key used in digital signature validation. Also disclosed is a business method that replaces the conventional public-key certificate with an agreement on the user's public key.

Abstract: The present invention creates flexibility into the RSA cryptography. The goal is achieved by allowing a user to select a personalized secret such as a password to derive an exponent that functions like a leading part of the RSA private key, and by further allowing the user to discretionarily change the selection without resorting to a regeneration of the public/private key pair. The invention also includes methods and cryptosystems of using a personalized secret and a crypto-key trio to produce and validate a digital signature. Exchanging a symmetric crypto key between two communication parties is one further application utilizing the devised techniques for the crypto-key generation, update, and validation.

Abstract: This patent application discloses techniques, devices and systems for user authentication based on linking between a randomly generated authentication secret and a personalized secret.

Abstract: Techniques and systems for protecting verifiable digital secrets such as encryption keys and identification codes based on partition and recovery processes are described. Implementations of the present techniques may be used, for example, to offer individuals a personalized tool for protecting secret data and to provide enhanced security. The partition and recovery may be carried out at the same computer or on separate computers.