Secret messages

This third demarcation seems unnecessary from a purely scientific point of view, but for several practical reasons, it is not Digital signature schemes, and authentication schemes generally, have nothing to do with keeping messages secret. For that purpose, one has secrecy schemes. 

Information about sex, reproductive condition and social status is all coded in chemical messages secreted or excreted by members of various species (see contributions in the three previous publications in this series) In addition to their information content, chemicals released by animals also affect physiological responses, and the vomeronasal organ seems to be particularly involved in reception of these chemical signals (pheromones). Many pheromonal effects depend on an intact vomeronasal system (see Table 1) they do not occur or are much reduced if the vomeronasal system of the recipient animal is rendered non-functional. Indeed, the organ has been implicated in the control of reproduction, especially in the onset of sexual... 

TNA, WO32/21200, Signals Message, Secret, BM 5267, 19 May 1945. For Welchman and Davidson Pratt see also Images 7 and 13. 

Yeesh What the hell did all that mean Well, let s see what Sunlight s preliminary interpretations are as were secreted to Strike via encrypted messages. It is interestingly voyeuristic to see the first machinations of a recipe come to life ... 

Carefully failing to tell the full story, Von Schnitzler said impatiently that here they were, having already wasted one day, and the absent Frossard evidently wasn t as eager to co-operate as he had pretended. Von Schnitzler did not mention the last message he and Ter Meer had received from Frossard only a few days before, via a report from Dr. Kramer, Farben s Paris representative. Kramer had met Frossard secretly at the Hotel Claridge. 

The following words have been jumbled up, you must enter the correct spellings and tronfer the numbered letters to the secret message. 

Secret Message DIAMOND IS THE HARDEST NATURAL MATERIAL... 

In addition to its structural role in bone, and in teeth, the calcium ion is a carrier of chemical messages. It influences secretion, contraction of muscle, cell division, growth, transcription, as well as other key physiological processes. 

Figure 9. Some factor secreting mutants expresses CSF-1 transcripts. Northern blot analysis. 12mg of total RNA/lane were analyzed. The major transcript was a 4.0 kb CSF-1 message. Results for parental Myl D7 cells, stroma dependent subclones derived and stroma independent mutants are shown 1, 3i-l 2, 5i-l 3, 6i-4 4, 61-5 5, 31-2 6, 4i-l 7, 5i-3 8, 6i-2 9, 6i-3 10, 6i-17 11, 6i-18 12, 6i-19 13, 6i-20 14, 61-21 15, 6i-22 16, 6i-23 17, 6i-26. Those stroma independent mutants that are secretors are also indicated. Although additional CSF-1 specific splice variants could be detected at low levels in MS-5 and Myl-D7 mutants with high CSF-1 expression, no mutant/cell line specific splice product could be shown. However, the size of the splice product detected depended on the probe that was used for hybridization. Two additional messages (3.2 kb and 2.3 kb) were detected by hybridization with a full length CSF-1 cDNA and only one additional message (2.3kb) was detected by hybridization with a 3 fragment of the cDNA.

Low expression of a 4kb transcript was detected in uncloned cells of Myl-D7 and in all stroma-dependent subclones. Two types of secreting mutants were identified. About half of the secretors (7/16), expresses ectopically high levels of CSF-1 transcripts (e.g. 5i-l, 5i-3, 61-2, 61-3, 6i-4). The remainder of the secretors expressed low levels of CSF-1 transcripts, comparable to the very low level of CSF-1 message in wild type Myl-D7 (e.g. 6i-5, 61-21, 61-22, 61-26). 

Think twice before you send confidential, private, or other sensitive material in an e-mail message. E-mail messages can be intercepted. The information may reach people other than those you intend. Unless you are confident that the server is secure, you may not want to include information about yourself (Social Security number, credit card number, and so on) or your company s secrets (strategic plans for the future, account numbers, and so on). In fact, your company may have regulations about what can and cannot be sent over e-mail or the Internet. Find out and follow your company s guidelines. 

Of course, we don t always have a choice. That s why our bodies have evolved the ability to secrete adrenaline and cortisol. Sometimes we need a sudden burst of energy, a boost to the heart s pumping capacity. Sometimes we have to flee and sometimes we re obliged to fight, as Selye was when he faced the mugger. Decide what is worth fighting for and what is not, was Selye s message, because it may be a matter of life or death. 

In general, secret inks derive from two reagents that produce a color. Sometimes one of the reagents is heat — the simplest ink is made by writing on paper with a solution of a colorless substance that chars when it is heated. Lemon juice works well for this purpose, and it was apparently used during the French Revolution. Urine does the trick, as well. Many a message has... 

Perhaps the most spectacular secret ink is Prussian blue, which forms by means of a chemical reaction between ferric sulfate and potassium ferrocyanide. Generally, a message written with ferric sulfate solution will be revealed when it is sprayed with ferrocyanide. A spy can soak fabric with each of these solutions and transport secret information without detection. During World War ii a German spy named George Vaux Bacon made notations on his socks and cloth buttons with the secret ink reagents. He, too, was caught and executed. 

Another secret-ink system used by the Germans during the war involved the chemical reactions between lead nitrate and sodium sulfide. As any high school student should know, solutions of these compounds are colorless, but form a black precipitate of lead sulfide when mixed. A spy can inscribe a message with the lead solution, and its recipient can read the missive by spraying it with the sodium sulfide solution. 

Secondly, most employers can easily and legally track what you re doing with your computer, so they will be able to determine what websites you visit as well as read your e-mail messages if they choose. Thus, if you are trying to keep your job-search efforts a secret from your current employer, using your computer at work is often a sure way to get caught. 

---