Defensive techniques

Bài giảng Kỹ thuật lập trình (Programming technique): Chương 5, chương này cung cấp cho học viên những nội dung về: defensive programming; bảo vệ chương trình khỏi các Invalid Inputs; kỹ thuật xử lý lỗi (error handling techniques); xử lý ngoại lệ - exceptions;... Mời các bạn cùng tham khảo chi tiết nội dung bài giảng!

42p duonghoanglacnhi 07-11-2022 12 4   Download

The research objective of the thesis is to select microorganisms capable of producing laccase, laccaselike from Ba Vi National Forest area, in herbicide / dioxin contaminated soil at Bien Hoa airport. Assessing the ability of decomposing herbicides containing dioxin and reactive dyes by laccase, laccase-like and VSV strains were selected to guide the application in defense activities.

27p xacxuoc4321 11-07-2019 43 5   Download

Q: Are pings forwarded by routers? A: Yes! This is why you can ping devices all over the Internet. Q: Do all devices forward or respond to pings? A: No, this is up to the network administrator of the device. Devices, including routers, can be configured not to reply to pings (ICMP echo requests). This is why you may not always be able to ping a device. Also, routers can be configured not to forward pings destined for other devices.

27p vanmanh1008 21-05-2013 45 4   Download

We now begin our look at building protocols using the basic tools that we have discussed. The discussion in this lecture will focus on issues of key establishment and the associated notion of authentication These protocols are not real, but instead are meant to serve just as a high-level survey Later lectures will go into specific protocols and will uncover practical challenges faced when implementing these protocols

20p muathu_102 28-01-2013 65 9   Download

SIP is a lightweight, transport-independent, text-based protocol. SIP has the following features: Lightweight, in that SIP has only four methods, reducing complexity Transport-independent, because SIP can be used with UDP, TCP, ATM & so on. Text-based, allowing for low overhead SIP is primarily used for VOIP calls

40p muathu_102 28-01-2013 75 9   Download

Root of Trust in a PC Operations or actions based on the TPM have measurable trust. Flexible usage model permits a wide range of actions to be defined. Doesn’t Control PC (About DRM) User still has complete control over platform. It’s OK to turn the TPM off (it ships disabled). User is free to install any software he/she pleases.

37p muathu_102 28-01-2013 38 5   Download

will consider authentication functions developed to support application-level authentication & digital signatures will consider Kerberos – a private-key authentication service then X.509 - a public-key directory authentication service

26p muathu_102 28-01-2013 62 5   Download

Web now widely used by business, government, individuals but Internet & Web are vulnerable have a variety of threats integrity confidentiality denial of service authentication need added security mechanisms

24p muathu_102 28-01-2013 71 5   Download

Each of the messages, like each one he had ever read of Stern's commands, began with a number and ended with a number or row of numbers. No efforts on the part of Mungo or any of his experts had been able to break Stern's code, nor was there any clue as to what the preliminary number and those ultimate numbers signified. —Talking to Strange Men, Ruth Rendell

22p muathu_102 28-01-2013 66 6   Download

At cats' green on the Sunday he took the message from the inside of the pillar and added Peter Moran's name to the two names already printed there in the "Brontosaur" code. The message now read: “Leviathan to Dragon: Martin Hillman, Trevor Allan, Peter Moran: observe and tail.” What was the good of it John hardly knew. He felt better, he felt that at last he had made an attack on Peter Moran instead of waiting passively and effecting no retaliation. Besides, what was the use of being in possession of the key to the codes if he never took...

22p muathu_102 28-01-2013 63 5   Download

To guard against the baneful influence exerted by strangers is therefore an elementary dictate of savage prudence. Hence before strangers are allowed to enter a district, or at least before they are permitted to mingle freely with the inhabitants, certain ceremonies are often performed by the natives of the country for the purpose of disarming the strangers of their magical powers, or of disinfecting, so to speak, the tainted atmosphere by which they are supposed to be surrounded. —The Golden Bough, Sir James George Frazer ...

23p muathu_102 28-01-2013 54 5   Download

No Singhalese, whether man or woman, would venture out of the house without a bunch of keys in his hand, for without such a talisman he would fear that some devil might take advantage of his weak state to slip into his body. —The Golden Bough, Sir James George Frazer

30p muathu_102 28-01-2013 49 4   Download

"I am fairly familiar with all the forms of secret writings, and am myself the author of a trifling monograph upon the subject, in which I analyze one hundred and sixty separate ciphers," said Holmes. —The Adventure of the Dancing Men, Sir Arthur Conan Doyle

32p muathu_102 28-01-2013 46 3   Download

The Devil said to Daniel Webster: "Set me a task I can't carry out, and I'll give you anything in the world you ask for." Daniel Webster: "Fair enough. Prove that for n greater than 2, the equation an + bn = cn has no non-trivial solution in the integers." They agreed on a three-day period for the labor, and the Devil disappeared. At the end of three days, the Devil presented himself, haggard, jumpy, biting his lip. Daniel Webster said to him, "Well, how did you do at my task? Did you prove the theorem?' "Eh? No . . . no, I haven't...

18p muathu_102 28-01-2013 50 3   Download

John wrote the letters of the alphabet under the letters in its first lines and tried it against the message. Immediately he knew that once more he had broken the code. It was extraordinary the feeling of triumph he had. He felt on top of the world. For not only had he done it, had he broken the July code, but he now had the key to every future coded message, since instructions as to the source of the next one must of necessity appear in the current one at the end of each month. —Talking to Strange Men, Ruth Rendell ...

23p muathu_102 28-01-2013 54 2   Download

Every Egyptian received two names, which were known respectively as the true name and the good name, or the great name and the little name; and while the good or little name was made public, the true or great name appears to have been carefully concealed. —The Golden Bough, Sir James George Frazer

27p muathu_102 28-01-2013 58 2   Download

The art of war teaches us to rely not on the likelihood of the enemy's not coming, but on our own readiness to receive him; not on the chance of his not attacking, but rather on the fact that we have made our position unassailable. —The Art of War, Sun Tzu

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Many savages at the present day regard their names as vital parts of themselves, and therefore take great pains to conceal their real names, lest these should give to evil-disposed persons a handle by which to injure their owners. —The Golden Bough, Sir James George Frazer

41p muathu_102 28-01-2013 57 3   Download

All the afternoon Mungo had been working on Stern's code, principally with the aid of the latest messages which he had copied down at the Nevin Square drop. Stern was very confident. He must be well aware London Central knew about that drop. It was obvious that they didn't care how often Mungo read their messages, so confident were they in the impenetrability of the code. —Talking to Strange Men, Ruth Rendell

37p muathu_102 28-01-2013 42 2   Download

Protect web content from those who don’t have a “need to know” Require users to authenticate using a userid/password before they are allowed access to certain URLs HTTP/1.1 requires that when a user makes a request for a protected resource the server responds with a authentication request header WWW-Authenticate contains enough pertinent information to carry out a “challenge-response” session between the user and the server

13p muathu_102 28-01-2013 49 2   Download