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$ QUADRANT

(O) /U.S. Government/ Short name for technology and methods that protect cryptographic equipment by making the equipment tamper- resistant. [C4009] (Compare: protective packaging, TEMPEST.)

Tutorial: Equipment cannot be made completely tamper-proof, but it can be made tamper-resistant or tamper-evident.

$ qualified certificate

(I) A public-key certificate that has the primary purpose of identifying a person with a high level of assurance, where the certificate meets some qualification requirements defined by an applicable legal framework, such as the European Directive on Electronic Signature. [R3739]

$ quick mode

(I) See: /IKE/ under "mode".

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