public-keyencryptionanddigitalsignatures-免費(fèi)閱讀
【正文】 PublicKey Encryption and Digital Signatures Stallings, Data and Computer Communications, 7th Edition, Pearson/PrenticeHall PublicKey Encryption and Digital Signatures ? 1976Proposed by Diffie and Hellman ? Based on mathematical functions instead of simple operations on bit patterns. ? Considered to be “asymmetric”, since two keys are usedone to encrypt and a second to decrypt. ? In general, public key is not necessarily more secure than symmetric ciphers. ? Security in general depends on key length and the putational work involved in breaker a cipher. PublicKey Encryption and Digital Signatures () ? Publickey Encryption (Fig. ) – 1. Each end system generates a pair of keys. –2. Each end system publishes its “public” encryption key. – 3. A sends B a message us
教學(xué)課件相關(guān)推薦
鄂ICP備17016276號-1