Key signature A minor as each accidental may be notated explicitly as required, or the piece may be modal or atonal. An example is Bartók's Piano Sonata, which has no fixed key and is highly chromatic. If not bound by common practice conventions, microtones can also be notated in a key signature; which microtonal symbols are used depends on the system. The common practice period conventions are so firmly established that some musical notation programs have been unable to show nonstandard key signatures until recently. The use of a one-flat signature developed in the Medieval period, but signatures with more than one
Blind signature the signer's public key which the attacker wants to learn more about. When the attacker removes the blindness the signed version they will have the clear text: where formula_3 is the encrypted version of the message. When the message is signed, the cleartext formula_11 is easily extracted: Note that formula_17 refers to Euler's totient function. The message is now easily obtained. This attack works because in this blind signature scheme the signer signs the message directly. By contrast, in an unblinded signature scheme the signer would typically use a padding scheme (e.g. by instead signing the result of a cryptographic