RSAn.¹

Brit.

/ˌɑːrɛsˈeɪ/, U.S.

/ˌɑrɛsˈeɪ/

Forms: 1800s– R.S.A., 1900s– RSA.

Origin: Formed within English, as an initialism. Etymon: English Royal Society of Arts.

Etymology: Initialism < Royal Society of Arts.The full title of the RSA is Royal Society for the Encouragement of Arts, Manufactures and Commerce.

Royal Society of Arts; (also, with plural) a Royal Society of Arts examination, esp. in typing or secretarial skills (now chiefly historical).

ΘΚΠ

the mind > mental capacity > knowledge > scholarly knowledge, erudition > learned person, scholar > [noun] > learned association > Royal Society of Arts

RSA1825

1825 Lancet 22 Jan. 77/1 The learned member of the R.S.A. never, even by accident, suffers our risibility to flag.

1919 Times 13 Nov. 10/1 (advt.) The R.S.A. does not receive entries from individual candidates.

1973 M. Amis Rachel Papers 64 Not that age was a helpful grouping criterion, the elder lot ranging as they did from fifteen (a delinquent ghoul studying for RSAs) to nineteen (myself).

1976 Daily Times (Lagos) 8 Oct. 24/1 (advt.) Applicants should possess..RSA or Pitmans or Government Certificate or their equivalent for 100/50 w.p.m. in shorthand and typewriting.

2005 Waste Age (Nexis) June 90 RSA hopes that the towering sculpture will prompt consumers to think more about recycling—or at least scare them into doing it, perhaps.

This entry has been updated (OED Third Edition, March 2011; most recently modified version published online March 2022).

RSAn.²

Brit.

/ˌɑːrɛsˈeɪ/, U.S.

/ˌɑrɛsˈeɪ/

Origin: Formed within English, as an initialism. Etymons: proper names Ronald Linn Rivest, Adi Shamir, Leonard Max Adleman.

Etymology: Initialism < the names of Ronald Linn Rivest (b. 1947), Adi Shamir (b. 1952), and Leonard Max Adleman (b. 1945), who invented the algorithm in 1977 ( R. L. Rivest et al. On Digital Signatures & Public-Key Cryptosystems (Laboratory for Computer Science, Massachusetts Inst. Technol., 1977); R. L. Rivest et al. in Communications Assoc. Computing Machinery (1978) 21 120).C. Cocks, a British mathematician, described an equivalent system in 1973, but in a classified document that was not published until 1998.

Cryptography.

I. Compounds.

1. attributive. Designating a public-key encryption algorithm based on the difficulty of finding the prime factors of very large numbers; employing or based on this algorithm.RSA is a proprietary name for goods and services related to this algorithm.

ΚΠ

1978 L. M. Kohnfelder Towards Pract. Public-key Cryptosystem (B.Sc. thesis, Mass. Inst. Technol.) 1 The trap door permutation which underlies the RSA algorithm is presented and its computability and difficulty to invert discussed.

1988 Bull. Atomic Scientists July 53/1 RSA public-key encryption (which is practically unbreakable).

1996 M. Urban UK Eyes Alpha (1997) xix. 250 The RSA system had its drawbacks, notably that it took a long time..to encrypt a message.

2011 J. Gleick Information xiii. 370 This happens to be the key to cracking the most widespread cryptographic algorithms in use today, particularly RSA encryption.

II. Simple uses.

2. A public-key encryption algorithm based on the difficulty of finding the prime factors of very large numbers; an encryption system employing this algorithm.

ΚΠ

1981 SIAM Rev. 23 269 He..describes the Rabin signature scheme as well as RSA, the elegant public key cryptosystem and digital signature scheme due to Rivest, Shamir and Adleman.

1984 New Scientist 19 Jan. 9/3 Messages are sent in DES and their keys in RSA.

1996 WEBTechniques Aug. 37/1 RSA, the public-key encryption method used in Pretty Good Privacy, is a patented, public-key algorithm that can be used to generate digital signatures.

2005 Sci. Amer. (U.K. ed.) Jan. 67/1 The advent of the quantum information era..may portend the eventual demise of RSA and other cryptographic schemes.

This is a new entry (OED Third Edition, March 2011; most recently modified version published online March 2022).

单词	rsa
释义	RSAn.¹ Brit. /ˌɑːrɛsˈeɪ/, U.S. /ˌɑrɛsˈeɪ/ Forms: 1800s– R.S.A., 1900s– RSA. Origin: Formed within English, as an initialism. Etymon: English Royal Society of Arts. Etymology: Initialism < Royal Society of Arts.The full title of the RSA is Royal Society for the Encouragement of Arts, Manufactures and Commerce. Royal Society of Arts; (also, with plural) a Royal Society of Arts examination, esp. in typing or secretarial skills (now chiefly historical). ΘΚΠ the mind > mental capacity > knowledge > scholarly knowledge, erudition > learned person, scholar > [noun] > learned association > Royal Society of Arts RSA1825 1825 Lancet 22 Jan. 77/1 The learned member of the R.S.A. never, even by accident, suffers our risibility to flag. 1919 Times 13 Nov. 10/1 (advt.) The R.S.A. does not receive entries from individual candidates. 1973 M. Amis Rachel Papers 64 Not that age was a helpful grouping criterion, the elder lot ranging as they did from fifteen (a delinquent ghoul studying for RSAs) to nineteen (myself). 1976 Daily Times (Lagos) 8 Oct. 24/1 (advt.) Applicants should possess..RSA or Pitmans or Government Certificate or their equivalent for 100/50 w.p.m. in shorthand and typewriting. 2005 Waste Age (Nexis) June 90 RSA hopes that the towering sculpture will prompt consumers to think more about recycling—or at least scare them into doing it, perhaps. This entry has been updated (OED Third Edition, March 2011; most recently modified version published online March 2022). RSAn.² Brit. /ˌɑːrɛsˈeɪ/, U.S. /ˌɑrɛsˈeɪ/ Origin: Formed within English, as an initialism. Etymons: proper names Ronald Linn Rivest, Adi Shamir, Leonard Max Adleman. Etymology: Initialism < the names of Ronald Linn Rivest (b. 1947), Adi Shamir (b. 1952), and Leonard Max Adleman (b. 1945), who invented the algorithm in 1977 ( R. L. Rivest et al. On Digital Signatures & Public-Key Cryptosystems (Laboratory for Computer Science, Massachusetts Inst. Technol., 1977); R. L. Rivest et al. in Communications Assoc. Computing Machinery (1978) 21 120).C. Cocks, a British mathematician, described an equivalent system in 1973, but in a classified document that was not published until 1998. Cryptography. I. Compounds. 1. attributive. Designating a public-key encryption algorithm based on the difficulty of finding the prime factors of very large numbers; employing or based on this algorithm.RSA is a proprietary name for goods and services related to this algorithm. ΚΠ 1978 L. M. Kohnfelder Towards Pract. Public-key Cryptosystem (B.Sc. thesis, Mass. Inst. Technol.) 1 The trap door permutation which underlies the RSA algorithm is presented and its computability and difficulty to invert discussed. 1988 Bull. Atomic Scientists July 53/1 RSA public-key encryption (which is practically unbreakable). 1996 M. Urban UK Eyes Alpha (1997) xix. 250 The RSA system had its drawbacks, notably that it took a long time..to encrypt a message. 2011 J. Gleick Information xiii. 370 This happens to be the key to cracking the most widespread cryptographic algorithms in use today, particularly RSA encryption. II. Simple uses. 2. A public-key encryption algorithm based on the difficulty of finding the prime factors of very large numbers; an encryption system employing this algorithm. ΚΠ 1981 SIAM Rev. 23 269 He..describes the Rabin signature scheme as well as RSA, the elegant public key cryptosystem and digital signature scheme due to Rivest, Shamir and Adleman. 1984 New Scientist 19 Jan. 9/3 Messages are sent in DES and their keys in RSA. 1996 WEBTechniques Aug. 37/1 RSA, the public-key encryption method used in Pretty Good Privacy, is a patented, public-key algorithm that can be used to generate digital signatures. 2005 Sci. Amer. (U.K. ed.) Jan. 67/1 The advent of the quantum information era..may portend the eventual demise of RSA and other cryptographic schemes. This is a new entry (OED Third Edition, March 2011; most recently modified version published online March 2022). < n.¹1825n.²1978
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