---
title: "1 Insane person Quotes By David Kahn"
description: "1 Insane person quotes by David Kahn. Plus more from David Kahn and more Insane person sayings from other authors."
image: "https://sms4smile.com/quotes/i/1a8/david-kahn-13896_insane-person_between-321-and-300-b-c-recommended-that_2793559.jpg"
---

> [ “between 321 and 300 B.C., recommended that ambassadors use cryptanalysis to obtain intelligence: “If there is no possibility of carrying on any such conversation (conversation with the people regarding their loyalty), he \[the envoy\] may try to gather such information… ](https://sms4smile.com/quotes/david-kahn/between-321-and-300-b-c-recommended-that-ambassadors-use/)

[David Kahn](https://sms4smile.com/quotes/author/david-kahn/)

[Image](https://sms4smile.com/quotes/i/1a8/david-kahn-13896_insane-person_between-321-and-300-b-c-recommended-that_2793559.jpg)

## More by David Kahn

> [“Hildegard von Bingen, an 11th-century nun who saw apocalyptic visions and was later canonized, had a cipher alphabet which she claimed came to her…](https://sms4smile.com/quotes/david-kahn/hildegard-von-bingen-an-11th-century-nun-who-saw-apocalyptic-visions/)

[David Kahn](https://sms4smile.com/quotes/author/david-kahn/)

> [“the most famous of all those who had an acquaintance with cryptology in the Middle Ages was an English customs official, amateur astronomer, and…](https://sms4smile.com/quotes/david-kahn/the-most-famous-of-all-those-who-had-an-acquaintance-with-cryptology/)

[David Kahn](https://sms4smile.com/quotes/author/david-kahn/)

> [“The task of the cryptanalysts consisted primarily of reconstructing the wiring and switches of the coding wheels—a task made more burdensome by the daily…](https://sms4smile.com/quotes/david-kahn/the-task-of-the-cryptanalysts-consisted-primarily-of-reconstructing/)

[David Kahn](https://sms4smile.com/quotes/author/david-kahn/)

> [“Analyzing the frequency and contacts of letters is the most universal, most basic of cryptanalytic procedures.”](https://sms4smile.com/quotes/david-kahn/analyzing-the-frequency-and-contacts-of-letters-is-the-most-universal/)

[David Kahn](https://sms4smile.com/quotes/author/david-kahn/)

> [“General Joseph O. Mauborgne, who became Chief Signal Officer in October, 1937. Mauborgne had long been interested in cryptology. In 1914, as a young…](https://sms4smile.com/quotes/david-kahn/general-joseph-o-mauborgne-who-became-chief-signal-officer-in-october/)

[David Kahn](https://sms4smile.com/quotes/author/david-kahn/)

> [“The only writer of the Middle Ages to describe cryptography instead of just using it was Roger Bacon, the English monk of startlingly modern…](https://sms4smile.com/quotes/david-kahn/the-only-writer-of-the-middle-ages-to-describe-cryptography-instead/)

[David Kahn](https://sms4smile.com/quotes/author/david-kahn/)

> [“Cryptology served magical purposes frequently throughout the Middle Ages, and even in the Renaissance was still disguising important parts of alchemical formulas.”](https://sms4smile.com/quotes/david-kahn/cryptology-served-magical-purposes-frequently-throughout-the-middle/)

[David Kahn](https://sms4smile.com/quotes/author/david-kahn/)

> [“Ibn ad-Duraihim, according to Qalqashandi, gave seven systems of cipher:”](https://sms4smile.com/quotes/david-kahn/ibn-ad-duraihim-according-to-qalqashandi-gave-seven-systems-of-cipher/)

[David Kahn](https://sms4smile.com/quotes/author/david-kahn/)

> [“The technique was at least moderately well known, for Ibn Khaldūn wrote in The Muqaddimah: “Occasionally, skillful secretaries, though not the first to invent…](https://sms4smile.com/quotes/david-kahn/the-technique-was-at-least-moderately-well-known-for-ibn-khald-n/)

[David Kahn](https://sms4smile.com/quotes/author/david-kahn/)

> [“Cryptology was born among the Arabs. They were the first to discover and write down the methods of cryptanalysis. The people that exploded out…](https://sms4smile.com/quotes/david-kahn/cryptology-was-born-among-the-arabs-they-were-the-first-to-discover/)

[David Kahn](https://sms4smile.com/quotes/author/david-kahn/)

> [“Another steganographic system was still in use in the 20th century: Aeneas suggested pricking holes in a book or other document above or below…](https://sms4smile.com/quotes/david-kahn/another-steganographic-system-was-still-in-use-in-the-20th-century/)

[David Kahn](https://sms4smile.com/quotes/author/david-kahn/)

> [“Also of great importance in the discovery of linguistic phenomena that led to cryptanalysis was the development of lexicography.”](https://sms4smile.com/quotes/david-kahn/also-of-great-importance-in-the-discovery-of-linguistic-phenomena/)

[David Kahn](https://sms4smile.com/quotes/author/david-kahn/)

> [“The world owes its first instructional text on communications security to the Greeks. It appeared as an entire chapter in one of the earliest…](https://sms4smile.com/quotes/david-kahn/the-world-owes-its-first-instructional-text-on-communications/)

[David Kahn](https://sms4smile.com/quotes/author/david-kahn/)

> [“His method resembles George Bernard Shaw’s way of using the /f/ sound of GH in “tough,” the /i/ sound of o in “women,” and…](https://sms4smile.com/quotes/david-kahn/his-method-resembles-george-bernard-shaw-s-way-of-using-the-f-sound/)

[David Kahn](https://sms4smile.com/quotes/author/david-kahn/)

> [“Much of the history of cryptology of this time is a patchwork, a crazy quilt of unrelated items, sprouting, flourishing, withering. Only toward the…](https://sms4smile.com/quotes/david-kahn/much-of-the-history-of-cryptology-of-this-time-is-a-patchwork-a-crazy/)

[David Kahn](https://sms4smile.com/quotes/author/david-kahn/)

```json
{
    "@context": "https://schema.org",
    "@graph": [
        {
            "@type": "ItemList",
            "@id": "https://sms4smile.com/quotes/about/insane-person/david-kahn/#itemlist",
            "name": "1 Insane person Quotes By David Kahn",
            "numberOfItems": 1,
            "itemListElement": [
                {
                    "@type": "ListItem",
                    "position": 1,
                    "item": {
                        "@type": "Quotation",
                        "text": "“between 321 and 300 B.C., recommended that ambassadors use cryptanalysis to obtain intelligence: “If there is no possibility of carrying on any such conversation (conversation with the people regarding their loyalty), he [the envoy] may try to gather such information by observing the talk of beggars, intoxicated and insane persons, or of persons babbling in sleep, or by observing the signs made in places of pilgrimage and temples, or by deciphering paintings or secret writings.”",
                        "creator": {
                            "@type": "Person",
                            "name": "David Kahn"
                        },
                        "url": "https://sms4smile.com/quotes/david-kahn/between-321-and-300-b-c-recommended-that-ambassadors-use/",
                        "image": {
                            "@type": "ImageObject",
                            "@id": "https://sms4smile.com/quotes/i/1a8/david-kahn-13896_insane-person_between-321-and-300-b-c-recommended-that_2793559.jpg",
                            "contentUrl": "https://sms4smile.com/quotes/i/1a8/david-kahn-13896_insane-person_between-321-and-300-b-c-recommended-that_2793559.jpg",
                            "url": "https://sms4smile.com/quotes/i/1a8/david-kahn-13896_insane-person_between-321-and-300-b-c-recommended-that_2793559.jpg",
                            "width": 1080,
                            "height": 1080,
                            "caption": "“between 321 and 300 B.C., recommended that ambassadors use cryptanalysis to obtain intelligence: “If there…” — David Kahn",
                            "creditText": "SMS4Smile Quotes",
                            "creator": {
                                "@id": "https://sms4smile.com/quotes/#organization"
                            }
                        }
                    }
                }
            ]
        },
        {
            "@type": "CollectionPage",
            "@id": "https://sms4smile.com/quotes/about/insane-person/david-kahn/#webpage",
            "url": "https://sms4smile.com/quotes/about/insane-person/david-kahn/",
            "name": "Insane person Quotes by David Kahn",
            "isPartOf": {
                "@id": "https://sms4smile.com/quotes/#website"
            },
            "mainEntity": {
                "@id": "https://sms4smile.com/quotes/about/insane-person/david-kahn/#itemlist"
            },
            "primaryImageOfPage": {
                "@id": "https://sms4smile.com/quotes/i/1a8/david-kahn-13896_insane-person_between-321-and-300-b-c-recommended-that_2793559.jpg"
            },
            "description": "1 Insane person quotes by David Kahn. Plus more from David Kahn and more Insane person sayings from other authors.",
            "breadcrumb": {
                "@id": "https://sms4smile.com/quotes/about/insane-person/david-kahn/#breadcrumb"
            }
        },
        {
            "@type": "BreadcrumbList",
            "@id": "https://sms4smile.com/quotes/about/insane-person/david-kahn/#breadcrumb",
            "itemListElement": [
                {
                    "@type": "ListItem",
                    "position": 1,
                    "name": "Home",
                    "item": "https://sms4smile.com/"
                },
                {
                    "@type": "ListItem",
                    "position": 2,
                    "name": "Quotes",
                    "item": "https://sms4smile.com/quotes/"
                },
                {
                    "@type": "ListItem",
                    "position": 3,
                    "name": "Topics",
                    "item": "https://sms4smile.com/quotes/categories/"
                },
                {
                    "@type": "ListItem",
                    "position": 4,
                    "name": "Insane Person",
                    "item": "https://sms4smile.com/quotes/about/insane-person/"
                },
                {
                    "@type": "ListItem",
                    "position": 5,
                    "name": "David Kahn",
                    "item": "https://sms4smile.com/quotes/about/insane-person/david-kahn/"
                }
            ]
        },
        {
            "@type": "WebSite",
            "@id": "https://sms4smile.com/quotes/#website",
            "name": "SMS4Smile Quotes",
            "url": "https://sms4smile.com/quotes/",
            "publisher": {
                "@id": "https://sms4smile.com/quotes/#organization"
            }
        },
        {
            "@type": "Organization",
            "@id": "https://sms4smile.com/quotes/#organization",
            "name": "SMS4Smile Quotes",
            "url": "https://sms4smile.com/quotes/",
            "logo": {
                "@type": "ImageObject",
                "url": "https://sms4smile.com/quotes/wp-content/themes/sq/assets/icons/icon-512.png",
                "width": 512,
                "height": 512
            }
        }
    ]
}
```