The DEA cryptographic engine that is used by the Triple Data Encryption Algorithm (TDEA). (SP 800-67) (NISTIR)
What does DEA mean?
The term Data Encryption Algorithm (DEA) refers to a historical term for a symmetric data-encryption algorithm or mechanism used to transform plaintext into ciphertext and back using a secret key. It gives election, security, legal, or technical readers a specific label for the concept rather than a broader everyday meaning.
How is data encryption algorithm (DEA) used in cryptography or COMSEC?
In practice, Data Encryption Algorithm (DEA) is applied to the technical or security purpose captured by its definition: a historical term for a symmetric data-encryption algorithm or mechanism used to transform plaintext into ciphertext and back using a secret key. Organizations combine that function with documented procedures, authorized access, testing, monitoring, and controls appropriate to the system.
Why does data encryption algorithm (DEA) need security controls?
Understanding Data Encryption Algorithm (DEA) matters because the concept can affect security, reliability, auditability, or trusted operation. In this glossary context, it refers to a historical term for a symmetric data-encryption algorithm or mechanism used to transform plaintext into ciphertext and back using a secret key.
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The DEA cryptographic engine that is used by the Triple Data Encryption Algorithm (TDEA). (SP 800-67) (NISTIR)
Cite this term
Election Security Glossary. (2026). Data Encryption Algorithm (dea). In Election Security Glossary. Retrieved August 21, 2026, from https://electionsecurityglossary.com/glossary/data-encryption-algorithm-dea
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