최소 단어 이상 선택하여야 합니다.
최대 10 단어까지만 선택 가능합니다.
다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
NTIS 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
DataON 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Edison 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0884867 (1992-05-13) |
발명자 / 주소 |
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인용정보 | 피인용 횟수 : 335 인용 특허 : 0 |
A public key cryptographic system is disclosed with enhanced digital signature certification which authenticates the identity of the public key holder. A hierarchy of nested certifications and signatures are employed which indicate the authority and responsibility levels of the individual whose sign
A public key cryptographic system is disclosed with enhanced digital signature certification which authenticates the identity of the public key holder. A hierarchy of nested certifications and signatures are employed which indicate the authority and responsibility levels of the individual whose signature is being certified. The certifier in constructing a certificate generates a special message that includes fields identifying the public key which is being certified, and the name of the certifiee. The certificate is constructed by the certifier to define the authority which is being granted and which may relate to a wide range of authorizations, delegation responsibilities or restrictions given to, or placed on the certifiee. Methodology is also disclosed by which multiple objects such as, for example, a cover letter, an associated enclosed letter, an associated graphics file, etc., are signed together. Methodology is also disclosed for digitally signing documents in which a digital signature is generated for both computer verification and for reverification if a document needs to be reconfirmed by reentering from a paper rendition.
In a communication system having a plurality of terminal devices coupled to a channel over which users may exchange messages, at least some of said users having a public key and an associated private key, a method for controlling authority in a message digitally signed by a first party comprising th
In a communication system having a plurality of terminal devices coupled to a channel over which users may exchange messages, at least some of said users having a public key and an associated private key, a method for controlling authority in a message digitally signed by a first party comprising the steps of: specifying a digital authority defining data structure including: a first digital field indicative of the public key of the first party, a second digital field indicative of the public key of a second party whose digital signature, in addition to the signature of the first party, must also be associated with the signed message in order for the signed message to be treated as properly authorized, and digitally signing the message such that the message is related to the digital authority defining data structure as part of the signature process, whereby message recipients may determine the digitally authority defining data structure during a signature verification process.
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