公开(公告)号：WO2008049046A3

公开(公告)日：2008-10-09

申请号：PCT/US2007081737

申请日：2007-10-18

Applicant: QUALCOMM INC ,  ROSE GREGORY GORDON ,  HAWKES PHILIP MICHAEL

Inventor： ROSE GREGORY GORDON ,  HAWKES PHILIP MICHAEL

IPC: H04L9/22

CPC classification number: H04L9/0662 ,  H04L2209/30

Abstract: A stream stretcher is provided for securely expanding a key stream to match the length of a data block to be encrypted and/or decrypted. A key stream is obtained having a length of L Z bits. A length LD corresponding to a data block to be encrypted/decrypted is obtained, where L D > L Z . L D -L Z new bits are recursively generated by combining at least two bits of the key stream. The L D -L Z new bits are appended to the key stream to generate a stretched key stream. The data block may then be encrypted/decrypted with the stretched key stream. The at least two bits are selected to have offsets that form a full positive difference set.

Abstract translation: 提供了流担架，用于安全地扩展密钥流以匹配要加密和/或解密的数据块的长度。 获得具有长度为L个Z位的密钥流。 获得对应于要加密/解密的数据块的长度LD，其中L L1> Z Z。 通过组合密钥流的至少两个比特递归地生成新的比特。 新的比特被添加到密钥流中以产生延伸的密钥流。 然后可以用拉伸的密钥流对数据块进行加密/解密。 选择至少两个位以具有形成完全正差分集的偏移。

公开(公告)号：WO2004038975A3

公开(公告)日：2004-12-02

申请号：PCT/US0323562

申请日：2003-07-24

Applicant: QUALCOMM INC

Inventor： HAWKES PHILIP MICHAEL ,  ROSE GREGORY G

IPC: H04K1/04 ,  H04L9/32 ,  H04K1/06

CPC classification number: H04L9/0637 ,  H04L9/0643 ,  H04L9/3242

Abstract: Methods and apparatus are presented herein for encrypting and authentication data, such that some of data can be transmitted in the clear but still be authenticated by the sender. A set of cleartext positions and/or a set of ciphertext positions are used to specify which data blocks will be used to generate an input checksum value (470) and an output checksum value (475). These checksums are then used to generate an authentication tag. (490)

Abstract translation: 本文提供了用于加密和认证数据的方法和装置，使得一些数据可以以清楚的方式发送，但仍由发送方认证。 一组明文位置和/或一组密文位置用于指定哪些数据块将用于生成输入校验和值（470）和输出校验和值（475）。 然后将这些校验和用于生成认证标签。 （490）