信息安全系統(tǒng)工程安全電子郵件-資料下載頁
2024-12-31 12:30本頁面
【正文】 Owner trust值；n 否則，指派不認(rèn)識的用戶值。信任關(guān)系處理過程（續(xù)）n 密鑰合法性字段（ Key legitimacy field） 的值基于該公鑰條目的簽名信任字段（ signature trust field） 來計(jì)算：n 如果至少有一個(gè)簽名具有終極信任 (ultimate trust)的值，則該密鑰的合法性字段的值為 “完全 ”；n 否則， PGP計(jì)算信任值的權(quán)重和。公鑰的作廢n 密鑰（私鑰）暴露或定時(shí)更新導(dǎo)致需要公鑰報(bào)廢功能n 通常的報(bào)廢方法是由擁有者簽發(fā)一個(gè) 密鑰報(bào)廢證書n 這個(gè)證書具有與通常簽名證書相同的形式，但包含一個(gè)指示符表明這個(gè)證書是要作廢該公鑰的使用。n 該公鑰所對應(yīng)的私鑰必須用來簽名這個(gè)密鑰報(bào)廢證書；該公鑰的擁有者應(yīng)盡可能越廣越快地散布這個(gè)證書，以使得潛在的有關(guān)人員更新他們的公鑰環(huán)。n 注意：攻擊者（竊取了別人的私鑰）也可以發(fā)出這個(gè)密鑰報(bào)廢證書：n 然而，這將導(dǎo)致他自己也被否決。因此，這樣比起惡意使用偷來的私鑰來看似乎會減少漏洞。三、 PGPsdkn PGPsdk—PGP Software Developer’s Kit 。n The PGPsdk provides everything a developer needs to incorporate any part of the PGP cryptosystem’s functionality into their own software. n The SDK includes the same Clanguage header files and runtime libraries that Network Associates’ own developers use to create the PGP software sold and distributed by Network Associates。n The library source is open for peer review 。PGPsdk（ cont）n Core PGP operationsn Generating and saving the user’s own key pairn Retrieving the user’s key pair from local storagen Obtaining an intended recipient’s public keyn Generating a digital signature (signing a message), with the user’s keyn Verifying a received digital signature, with the sender’s keyn Encryption for an intended recipient, with their public keyn Decryption of a received message, with the user’s private keyPGPsdk（ cont）n Primary PGP operationsn Local key managementn Ciphering and authenticationn Key server accessn Support Functionsn PGP API feature query functionsn Option list functionsn Group functionsn Utility toolbox functionsn Random number functionsn User interface functionsn TLS (transport layer security) functionsn Network socket functionsn Big number management functionsn Error functionsPGPsdk（ cont）續(xù)上表小結(jié)謝謝觀看 /歡迎下載BY FAITH I MEAN A VISION OF GOOD ONE CHERISHES AND THE ENTHUSIASM THAT PUSHES ONE TO SEEK ITS FULFILLMENT REGARDLESS OF OBSTACLES. BY FAITH I BY FAIT
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