An information security method, the method comprising: receiving,, at a Social Network Service, SNS, server of a first user, content and security information uploaded from a user device, wherein the security information includes: information of a user selection of a specific portion of the content, wherein the content comprises the specific portion and a remaining portion; and information for the selected portion of the content associated with the first user, the information including multiple security levels with priority levels of content access rights, wherein each security level of the multiple security levels corresponds to a priority level of content access rights, wherein a first security level of the multiple security levels permits displaying of the specific portion of the content and the remaining portion of the content, without censoring, and wherein a second security level of the multiple security levels permits displaying of the remaining portion of the content without censoring and the displaying of the specific portion of the content with censoring; and permitting display,, by the server of the SNS site of the remaining portion of the content and the selected portion of the content in accordance with a priority level of content access rights of a second user when the uploaded content is accessed at the SNS site by the second user, wherein the priority level of content access rights of the second user corresponds to either the first security level or the second security level, the method characterised in that: if the SNS server receives further security information from the second user that sets additional security information in an another portion of the content, the server of the SNS site determines display of the uploaded content based on both the security information set by the first user and the second user when the uploaded content is accessed by a third user on the SNS site. receiving,, at a Social Network Service, SNS, server of a first user, content and security information uploaded from a user device, wherein the security information includes: information of a user selection of a specific portion of the content, wherein the content comprises the specific portion and a remaining portion; and information for the selected portion of the content associated with the first user, the information including multiple security levels with priority levels of content access rights, wherein each security level of the multiple security levels corresponds to a priority level of content access rights, wherein a first security level of the multiple security levels permits displaying of the specific portion of the content and the remaining portion of the content, without censoring, and wherein a second security level of the multiple security levels permits displaying of the remaining portion of the content without censoring and the displaying of the specific portion of the content with censoring; and information of a user selection of a specific portion of the content, wherein the content comprises the specific portion and a remaining portion; and information for the selected portion of the content associated with the first user, the information including multiple security levels with priority levels of content access rights, wherein each security level of the multiple security levels corresponds to a priority level of content access rights, wherein a first security level of the multiple security levels permits displaying of the specific portion of the content and the remaining portion of the content, without censoring, and wherein a second security level of the multiple security levels permits displaying of the remaining portion of the content without censoring and the displaying of the specific portion of the content with censoring; and permitting display,, by the server of the SNS site of the remaining portion of the content and the selected portion of the content in accordance with a priority level of content access rights of a second user when the uploaded content is accessed at the SNS site by the second user, wherein the priority level of content access rights of the second user corresponds to either the first security level or the second security level, the method characterised in that: if the SNS server receives further security information from the second user that sets additional security information in an another portion of the content, the server of the SNS site determines display of the uploaded content based on both the security information set by the first user and the second user when the uploaded content is accessed by a third user on the SNS site. if the SNS server receives further security information from the second user that sets additional security information in an another portion of the content, the server of the SNS site determines display of the uploaded content based on both the security information set by the first user and the second user when the uploaded content is accessed by a third user on the SNS site.