高級(jí)密碼協(xié)議ppt課件-閱讀頁(yè)
2025-05-22 12:10本頁(yè)面
【正文】 cussion of security and implementation considerations so that a solution provider can choose appropriate security requirements for itself. Γ В ? Memorized secrets are an important factor in human authentication. ? will specify publickey cryptographic techniques specifically designed to securely perform passwordbased authentication and key exchange. These techniques provide a way to authenticate people and distribute highquality cryptographic keys for people, while preventing offline bruteforce attacks associated with passwords. ? Rather, the purpose is to provide: (1) a reference for specification of a variety of techniques from which applications may select, (2) the appropriate theoretic background, and (3) extensive discussion of security and implementation considerations so that a solution provider can choose appropriate security requirements. Γ В ? IEEE will specify IdentityBased Cryptographic techniques based on Pairings. These offer advantages over classic public key techniques specified in IEEE 1363. Examples are the lack of a requirement to exchange or look up public keys of a recipient and the simplified use of shortlived keys. ? It is not the purpose of this project to mandate any particular set of identitybased publickey techniques, or particular attributes of publickey techniques such as key sizes. Rather, the purpose is to provide a reference for specifications of a variety of techniques from which applications may select. Γ В Certi ? Certi Corp. is a cryptography pany founded in 1985 by Gordon Agnew. ? The Certi intellectual property portfolio includes over 350 patents and patents pending worldwide that cover key aspects of elliptic curve cryptography (ECC): software optimizations, efficient hardware implementations, methods to enhance the security, and various cryptographic protocols. ? The National Security Agency (NSA) has licensed 26 of Certi39。秀爾（ Peter Shor）提出量子質(zhì)因子分解算法 – 1994年，貝爾實(shí)驗(yàn)室的專家彼得 ? 1982年，法國(guó)奧賽光學(xué)研究所的科學(xué)家就在實(shí)驗(yàn)室實(shí)現(xiàn)了光子 “ 混雜 ” ， 1997年，他們又使用光纖再次完成了這一實(shí)驗(yàn)。研究人員在一個(gè)實(shí)驗(yàn)室內(nèi)將第三束光與 “ 雙胞胎 ” 光束中的一束相互作用，他們觀察到在另一個(gè)實(shí)驗(yàn)室的另一束光也發(fā)生著這種變化。實(shí)驗(yàn)的成功，使光子 “ 混雜 ” 特性從實(shí)驗(yàn)室研究走向?qū)嶋H應(yīng)用邁出了新的一步，使量子遠(yuǎn)距離輸運(yùn)變成可能。（測(cè)量手段必然引入干擾） Γ В 量子密鑰分發(fā)協(xié)議 ? BB84 ? B92 Γ В 一次一密 (onetime pad) vs. 量子計(jì)算 ? 按照信息論觀點(diǎn)， onetime pad能抵抗量子計(jì)算 Γ В TODO：量子計(jì)算 ? 量子計(jì)算機(jī) – For a quantum puter, however, Peter Shor discovered an algorithm in 1994 that solves it in polynomial time. ? 量子密碼學(xué) – ―海森堡測(cè)不準(zhǔn) ” – “ 單量子不可復(fù)制 ” – 實(shí)驗(yàn)室階段 Γ В 側(cè)信道攻擊 ? TODO Γ В Q am
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