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The classic guide to network security--now fully updated!"Bob and Alice are back!" Widely regarded as the most comprehensive yet comprehensible guide to network security, the first edition of Network Security received critical acclaim for its lucid and witty explanations of the inner workings of network security protocols. In the second edition, this most distinguished of author teams draws on hard-won experience to explain the latest developments in this field that has become so critical to our global network-dependent society. "Network Security, Second Edition" brings together clear, insightful, and clever explanations of every key facet of information security, from the basics to advanced cryptography and authentication, secure Web and email services, and emerging security standards. Coverage includes: All-new discussions of the Advanced Encryption Standard (AES), IPsec, SSL, and Web securityCryptography: In-depth, exceptionally clear introductions to secret and public keys, hashes, message digests, and other crucial conceptsAuthentication: Proving identity across networks, common attacks against authentication systems, authenticating people, and avoiding the pitfalls of authentication handshakesCore Internet security standards: Kerberos 4/5, IPsec, SSL, PKIX, and X.509Email security: Key elements of a secure email system-plus detailed coverage of PEM, S/MIME, and PGPWeb security: Security issues associated with URLs, HTTP, HTML, and cookiesSecurity implementations in diverse platforms, including Windows, NetWare, and Lotus Notes The authors go far beyond documenting standards and technology: They contrast competing schemes, explain strengths and weaknesses, and identify thecrucial errors most likely to compromise secure systems. Network Security will appeal to a wide range of professionals, from those who design or evaluate security systems to system administrators and programmers who want a better understanding of this important field.

Mail, Apple's built-in mail application with Mac OS X, is largely unsung. It's used by millions of users, but there's no manual to show you the ropes. In Take Control of Apple Mail, longtime Mac consultant and writer Joe Kissell puts Mail through its paces, teaching you in step-by-step, illustrated examples how to best configure and use Mail's simple yet powerful features. You'll learn numerous solutions to real-world confusions and problems with Apple Mail, such as fixingproblems related to sending and receiving mail, dealing withauthentication errors, sending attachments successfully, repairingdamaged mailboxes, and connecting to Exchange servers. Joe alsocovers various ways to address outgoing messages quickly, backup and restore email, set up rules, and more.Along the way, you'll learn how to prevent spam from overtaking your mailbox, while two appendices cover related issues including sources and a brief description for third-party software that can enhance or supplement Mail.

Error message - An error message is a message displayed when an unexpected condition occurs, usually on a computer or other device. Error messages are often displayed using dialog boxes.

Email attachment - An email attachment (or e-mail attachment) is a file which is sent along with an e-mail message. In MIME, the standard format of e-mail messages, attaching a file to a message is accomplished by encoding both the original message and the file to be attached in a multipart message.

Internet Message Access Protocol - The Internet Message Access Protocol (commonly known as IMAP, and previously called Interactive Mail Access Protocol) is an application layer Internet protocol used for accessing email on a remote server from a local client. IMAP and POP3 (Post Office Protocol version 3) are the two most prevalent Internet standard protocols for email retrieval.

No Internal Message - "No Internal Message" is commonly abbreviated "NIM". It can be used at the end of a subject line of an email or online forum posting to indicate that the entirety of the message is contained in the subject line.

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