A QKD communication device (102, 102') comprising: a communication interface (102a, 102a') configured to communicate with a further QKD communication device (104, 104') for generating a secret key on the basis of a signal sequence associated with a plurality of quantum signals exchanged between the QKD communication device (102, 102') and the further QKD communication device (104, 104') via a quantum communication channel; and a processing unit (102b, 102') configured to: determine a noise level associated with the signal sequence; characterised in that the processing unit is further configured to: increase the noise level associated with the signal sequence depending on the determined noise level associated with the signal sequence for obtaining a modified signal sequence, such that the noise level associated with the modified signal sequence is larger than a predefined noise threshold value and/or falls within a predefined noise range; perform information reconciliation on the modified signal sequence for obtaining an error-free bit sequence; and generate the secret key on the basis of the error-free bit sequence. a communication interface (102a, 102a') configured to communicate with a further QKD communication device (104, 104') for generating a secret key on the basis of a signal sequence associated with a plurality of quantum signals exchanged between the QKD communication device (102, 102') and the further QKD communication device (104, 104') via a quantum communication channel; and a processing unit (102b, 102') configured to: determine a noise level associated with the signal sequence; characterised in that the processing unit is further configured to: increase the noise level associated with the signal sequence depending on the determined noise level associated with the signal sequence for obtaining a modified signal sequence, such that the noise level associated with the modified signal sequence is larger than a predefined noise threshold value and/or falls within a predefined noise range; perform information reconciliation on the modified signal sequence for obtaining an error-free bit sequence; and generate the secret key on the basis of the error-free bit sequence. determine a noise level associated with the signal sequence; characterised in that the processing unit is further configured to: increase the noise level associated with the signal sequence depending on the determined noise level associated with the signal sequence for obtaining a modified signal sequence, such that the noise level associated with the modified signal sequence is larger than a predefined noise threshold value and/or falls within a predefined noise range; perform information reconciliation on the modified signal sequence for obtaining an error-free bit sequence; and generate the secret key on the basis of the error-free bit sequence. increase the noise level associated with the signal sequence depending on the determined noise level associated with the signal sequence for obtaining a modified signal sequence, such that the noise level associated with the modified signal sequence is larger than a predefined noise threshold value and/or falls within a predefined noise range; perform information reconciliation on the modified signal sequence for obtaining an error-free bit sequence; and generate the secret key on the basis of the error-free bit sequence.