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    Method and apparatus for secure identification of a mobile user in a communication system and portable input means for making the same
    1.
    发明专利
    Method and apparatus for secure identification of a mobile user in a communication system and portable input means for making the same 未知

    公开(公告)号：CZ9700881A3

    公开(公告)日：2001-11-14

    申请号：CZ88197

    申请日：1994-10-27

    Applicant: IBM

    Inventor： TSUDIK GENE

    IPC: G06F21/20 ,  G06F15/00 ,  G09C1/00 ,  H04K1/00 ,  H04L9/08 ,  H04L9/32 ,  H04L29/06 ,  H04M1/68 ,  H04W12/06 ,  H04Q7/38

    Abstract: A method and an apparatus are provided for securely identifying a mobile user while avoiding trackability of his/her movements, i.e. it provides a way for a secure user identification in secrecy. The gist is to encrypt the user's identifier, and/or his/her password, and a synchronization indication, preferably a fixed time interval, under a secret one-way function and sending the encrypted message, called a "dynamic user identifier", to the user's "home authority" where he/she is registered. The home authority comprises correspondence tables listing, pre-computed for every time interval (or another chosen synchronization), the dynamic user identifiers and the corresponding true identity of the user and can thus quickly decide whether the received encrypted message originates from a registered user. On the other hand, an intruder is neither able to detect from the encrypted messages the identity of the user nor can he/she track a user's moves.

    2.
    发明专利
    未知

    公开(公告)号：DE69433509D1

    公开(公告)日：2004-02-26

    申请号：DE69433509

    申请日：1994-10-27

    Applicant: IBM

    Inventor： TSUDIK GENE

    IPC: G06F21/20 ,  G06F15/00 ,  G09C1/00 ,  H04K1/00 ,  H04L9/08 ,  H04L9/32 ,  H04L29/06 ,  H04M1/68 ,  H04W12/06 ,  H04Q7/38

    Abstract: A method and an apparatus are provided for securely identifying a mobile user while avoiding trackability of his/her movements, i.e. it provides a way for a secure user identification in secrecy. The gist is to encrypt the user's identifier, and/or his/her password, and a synchronization indication, preferably a fixed time interval, under a secret one-way function and sending the encrypted message, called a "dynamic user identifier", to the user's "home authority" where he/she is registered. The home authority comprises correspondence tables listing, pre-computed for every time interval (or another chosen synchronization), the dynamic user identifiers and the corresponding true identity of the user and can thus quickly decide whether the received encrypted message originates from a registered user. On the other hand, an intruder is neither able to detect from the encrypted messages the identity of the user nor can he/she track a user's moves.

    4.
    发明专利
    未知

    公开(公告)号：DE69312328T2

    公开(公告)日：1998-01-08

    申请号：DE69312328

    申请日：1993-09-20

    Applicant: IBM

    Inventor： HAUSER RALF ,  JANSON PHILIPPE ,  MOLVA REFIK ,  TSUDIK GENE ,  VAN HERREWEGHEN ELSIE

    IPC: G06F21/20 ,  G06F1/00 ,  G06F15/00 ,  G09C1/00 ,  H04L9/08 ,  H04L9/32

    Abstract: 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 server, the user's request including, at least partly encrypted, an identification of the sending user, old and new keys, and two nonces, at least one including a time indication. The authentication server's response includes a possibly encrypted accept/reject indication and the regularly encrypted request from the user.

    5.
    发明专利
    未知

    公开(公告)号：DE69433509T2

    公开(公告)日：2004-12-23

    申请号：DE69433509

    申请日：1994-10-27

    Applicant: IBM

    Inventor： TSUDIK GENE

    IPC: G06F21/20 ,  G06F15/00 ,  G09C1/00 ,  H04K1/00 ,  H04L9/08 ,  H04L9/32 ,  H04L29/06 ,  H04M1/68 ,  H04W12/06 ,  H04Q7/38

    Abstract: A method and an apparatus are provided for securely identifying a mobile user while avoiding trackability of his/her movements, i.e. it provides a way for a secure user identification in secrecy. The gist is to encrypt the user's identifier, and/or his/her password, and a synchronization indication, preferably a fixed time interval, under a secret one-way function and sending the encrypted message, called a "dynamic user identifier", to the user's "home authority" where he/she is registered. The home authority comprises correspondence tables listing, pre-computed for every time interval (or another chosen synchronization), the dynamic user identifiers and the corresponding true identity of the user and can thus quickly decide whether the received encrypted message originates from a registered user. On the other hand, an intruder is neither able to detect from the encrypted messages the identity of the user nor can he/she track a user's moves.

    6.
    发明专利
    未知

    公开(公告)号：AT258350T

    公开(公告)日：2004-02-15

    申请号：AT95900091

    申请日：1994-10-27

    Applicant: IBM

    Inventor： TSUDIK GENE

    IPC: G06F21/20 ,  G06F15/00 ,  G09C1/00 ,  H04K1/00 ,  H04L9/08 ,  H04L9/32 ,  H04L29/06 ,  H04M1/68 ,  H04W12/06 ,  H04Q7/38

    Abstract: A method and an apparatus are provided for securely identifying a mobile user while avoiding trackability of his/her movements, i.e. it provides a way for a secure user identification in secrecy. The gist is to encrypt the user's identifier, and/or his/her password, and a synchronization indication, preferably a fixed time interval, under a secret one-way function and sending the encrypted message, called a "dynamic user identifier", to the user's "home authority" where he/she is registered. The home authority comprises correspondence tables listing, pre-computed for every time interval (or another chosen synchronization), the dynamic user identifiers and the corresponding true identity of the user and can thus quickly decide whether the received encrypted message originates from a registered user. On the other hand, an intruder is neither able to detect from the encrypted messages the identity of the user nor can he/she track a user's moves.

    7.
    发明专利
    未知

    公开(公告)号：DE69312328D1

    公开(公告)日：1997-08-21

    申请号：DE69312328

    申请日：1993-09-20

    Applicant: IBM

    Inventor： HAUSER RALF ,  JANSON PHILIPPE ,  MOLVA REFIK ,  TSUDIK GENE ,  VAN HERREWEGHEN ELSIE

    IPC: G06F21/20 ,  G06F1/00 ,  G06F15/00 ,  G09C1/00 ,  H04L9/08 ,  H04L9/32

    Abstract: 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 server, the user's request including, at least partly encrypted, an identification of the sending user, old and new keys, and two nonces, at least one including a time indication. The authentication server's response includes a possibly encrypted accept/reject indication and the regularly encrypted request from the user.

    METHOD AND APPARATUS FOR SECURE IDENTIFICATION OF A MOBILE USER IN A COMMUNICATION NETWORK
    8.
    发明专利
    METHOD AND APPARATUS FOR SECURE IDENTIFICATION OF A MOBILE USER IN A COMMUNICATION NETWORK 未知

    公开(公告)号：CA2203131C

    公开(公告)日：2004-03-30

    申请号：CA2203131

    申请日：1994-10-27

    Applicant: IBM

    Inventor： TSUDIK GENE

    IPC: G06F21/20 ,  G06F15/00 ,  G09C1/00 ,  H04K1/00 ,  H04L9/08 ,  H04L9/32 ,  H04L29/06 ,  H04M1/68 ,  H04W12/06 ,  G06K19/07 ,  G06F12/14 ,  H04Q7/38

    Abstract: Communication between mobile users of and in a computer network is subject to a variety of security issues; user identification and user tracking are two particularly important ones. This invention provides a method and an apparatus for securely identifying a mobile user while avoiding trackability of his/her movements, i.e. it provides a way for a secure user identification in secrecy. The gist is to encrypt the user's identifier, and/or his/her password, and a synchronization indication, preferably a fixed time interval, under a secret one-way function and sending the encrypted message, herein called "dynamic user identifier", to the user's "home authority" where he/she is registered. The home authority comprises correspondence tables listing, pre-computed for every time interval (or another chosen synchronization), the dynamic user identifiers and the corresponding true identity of the user and can thus quickly decide whether the received encrypted message originates from a registered user. On the other hand, an intruder is neither able to detect from the encrypted messages the identity of the user nor can he/she track a user's moves.

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