暗

nyctophobia; fear of the dark; scotophobia

As 涙にかきくれる

to weep bitterly

to suddenly grow dark

butoh; style of contemporary Japanese dance featuring dancers in white paint

cryptocurrency

Computing

encryption key; cryptographic key

Physics

dark energy

total (utter) darkness

Computing

cryptography; encryption technology

Computing

cryptographic system; cryptosystem

Computing

encrypted mail; cyphermail

behind-the-scenes maneuvering; behind-the-scenes manoeuvering; secret maneuvers; secret manoeuvres

substitution cipher

Yojijukugo

beautiful scenery of spring

red-light district

Proverb

it's always darkest before the dawn; the darkest hour is just before the dawn

underdrainage

Computing

public key encryption

Proverb

suspicion begets monsters

crypto-assets; cryptocurrency assets

cryptography; cryptographic theory

Computing

encryption technology

shadow cast by a person's hand

gathering dark clouds; being under the shadow of

secretly; covertly; tacitly

dimness; dimly lit place