What is claimed is:
1. An information processor which implements a service by cooperatively operating a plurality of job processors each executing its processing in accordance with a process description defined in instruction data, the information processor comprising:
an encryption processor which encrypts the process description defined in said instruction data so as to make the process description representing a process to be executed by each one of the job processors decryptable for the job processor which executes the process, and
a transmitter which sends the instruction data, in which the process description is encrypted by said encryption processor, to the job processor which executes the process described in the encrypted process description.
2. An information processor according to claim 1, wherein said encryption processor encrypts the process description which is a current encryption target together with encrypted data on the process description about a downstream process to be carried out later than the process described in the process description of the current encryption target.
3. An information processor according to claim 1, wherein said encryption processor encrypts the process description which is a current encryption target using a public key for the job processor which executes the process described in the process description of the current encryption target.
4. An information processor according to claim 1, wherein said encryption processor encrypts a part of the process descriptions each representing the process to be executed by the job processor.
5. An information processor according to claim 4, wherein said encryption processor encrypts each part of the process description using different keys.
6. An information processor contained in a system which implements a service through cooperative operation of a plurality of job processors, the information processor comprising:
a receiver which receives instruction data in which an encrypted process description representing a process is contained;
a decryption processor which decrypts a part of the process description, which is received by the receiver, representing a process to be executed by the job processor itself;
a delete section which deletes the part of the process description decrypted by said decryption processor from the instruction data, and
a transmitter which sends the instruction data, from which the process description is deleted by said delete section, to the other job processors which subsequently execute their processing.
7. An information processing method carried out by a computer which implements a service by cooperatively operating a plurality of job processors each executing a process according to each one of a plurality of process descriptions defined in instruction data, the information processing method comprising the steps of:
encrypting the process description defined in said instruction data 80 as to make the process description representing the process to be executed by each one of the job processors decryptable for the job processor which executes the process, and
sending the encrypted instruction data to one of the job processors which executes the process described in said process description.
8. An information processing method carried out by at least one job processor contained in a system which implements a service through cooperative operation of a plurality of job processors in a predetermined order, the information processing method comprising the steps of:
receiving instruction data in which an encrypted process description representing a process is contained;
decrypting a part of the received process description representing the process to be executed by the job processor itself;
deleting the part of the decrypted process description from the instruction data, and
sending the instruction data from which the decrypted process description has been deleted to the other job processors which subsequently execute their processing.
9. A job processor which carries out a job according to a process description defined in instruction data, the job processor comprising:
an encryption processor which encrypts a subsequent process description defined in the instruction data So as to make the subsequent process description representing a subsequent job to be carried out by a subsequent job processor decryptable for the subsequent job processor, and
a transmitter which sends the instruction data, in which the subsequent process description is encrypted by said encryption processor, to the subsequent job processor after the job processor completes its processing.
10. A job processing method in which processing is carried out according to a process description defined in instruction data, the job processing method comprising the steps of:
encrypting the process description defined in said instruction data so as to make the process description representing a target job for another job processor decryptable for the subsequent job processor, and
sending the instruction data in which the process description is encrypted in said encrypting step after the job processor which executed the encrypting step completed its job, to the subsequent job processor.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
What is claimed is:
1. A method for removing lawn mower spindles and cutting blades mounted thereon from a lawn mower housing having more then one spindle and cutting blade comprising the steps of
A) obtaining a wrench having at least two interconnected nut holding ends capable of having the space therebetween adjustably secured,
B) lifting the mower housing sufficiently to place the wrench under the housing by hand,
C) placing one of the holding ends of said wrench on the head of one of the spindles and Simultaneously placing another holding end of the wrench on the head of the other of the spindles thereby simultaneously holding the spindles against rotation,
D) removing the nut on the top of the spindles and then moving the spindles out of the housing, out of any spacers and washers thereon, and finally out of the blade mounted thereon.
2. A method for removing from and then installing onto a lawn mower, spindles and cutting blades mounted thereon wherein the mower has more then one spindle and cutting blade comprising the steps of
A) obtaining a wrench having at least two interconnected nut holding ends capable of having the space therebetween adjustably secured,
B) lifting the mower housing sufficiently to place the wrench under the housing,
C) placing one of the holding ends of said wrench on the head of one of the spindles and placing another holding end of the wrench on the head of the other of the spindles and thereby simultaneously holding the spindles against rotation,
D) rotating and removing the nut on the top of the spindles and moving the spindles out of the housing, out of any spacers and washers thereon, and finally out of the blade mounted thereon,
E) obtaining a pair of sharpened cutting blades,
F) placing a blade spindle into the opening of each of the blades with the head of the spindle engaging the underside of the blade and the threaded end of the spindle projecting above the blade,
G) placing a spacer and washer on each of the spindles and inserting the spindles through registering openings in the deck of the lawn mower,
H) obtaining a wrench having at least two interconnecting nut holding ends,
I) placing one of the nut holding ends of the wrench on the head of one of the spindles and placing the other holding end on the head of the other spindle,
J) placing a pulley on each of the spindles in a non-rotative manner,
K) applying a nut on top of each of said spindles and then tightening the nut while holding the head of both of the spindles stationary,
L) lowering the housing.
3. The method according to claim 1 including the step of securing the spaced relationship of the interconnected nut holding ends of the wrench prior to placing the holding ends on the head ends of the spindle.