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Sanitizable signatures provide several security features which are useful in many scenarios including military and medical applications. Sanitizable signatures allow a semi-trusted party to update some part of the digitally signed document without interacting with the original signer. Such schemes, where the verifier cannot identify whether the message has(More)
Ring signature schemes (?) enable a signer to sign a message and remain hidden within an arbitrary group A of n people, called a ring. The signer may choose this ring arbitrarily without any setup procedure or the consent of anyone in A. Among several variations of the notion, step out ring signatures introduced in (?) address the issue of a ring member(More)
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