Call Waiting
Additional services allowing, during a presentation, know that another correspondent called.
Signaling
Transmission of service information (addresses, taxation ...) between nodes and / or terminals of a network.
Blind signature
Authorization to sign documents without knowing their content, similar to a notary.
Electronic signature
Signature-based systems Encryption to public key and private key to authenticate the sender of a document. The private key used to sign the public key used to verify the signature. The electronic signature is equivalent Digital handwritten signature.
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