# What does RSA stand for?

#### What does RSA mean? This page is about the various possible meanings of the acronym, abbreviation, shorthand or slang term: RSA.

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RSA

Royal & Sun Alliance Insurance Company

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Republic of South Africa

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Royal Society of Arts

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Responsible Serving of Alcohol

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Russian Space Agency

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Renaissance Society of America

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Revised Statutes Annotated

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Recurrent Spontaneous Abortion

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Runway Safety Area

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Returned Services Association

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Rancho San Antonio

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Riverside Sheriffs' Association

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Rochester Software Associates

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Revised Statutes of Alberta

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Roller Skating Association International

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Resident Students Association

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Regimental Support Area

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Ritual Sexual Abuse

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Santa Rosa, LP, Argentina

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Republiek van Suid-Afrika (Republic of South Africa)

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#### What does RSA mean?

RSA
RSA is an algorithm for public-key cryptography that is based on the presumed difficulty of factoring large integers, the factoring problem. RSA stands for Ron Rivest, Adi Shamir and Leonard Adleman, who first publicly described the algorithm in 1977. Clifford Cocks, an English mathematician, had developed an equivalent system in 1973, but it wasn't declassified until 1997. A user of RSA creates and then publishes the product of two large prime numbers, along with an auxiliary value, as their public key. The prime factors must be kept secret. Anyone can use the public key to encrypt a message, but with currently published methods, if the public key is large enough, only someone with knowledge of the prime factors can feasibly decode the message. Whether breaking RSA encryption is as hard as factoring is an open question known as the RSA problem.

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### RSA

Royal Society of Arts
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