Hi Ashu,
you did some strange things 
wherever. If you have time, try to proceed according to this checklist. Maybe it helps.
Service Account in Active Directory
☐Make sure, the account is not locked, has a known and never changing password
☐Make sure „Use DES encryption“ is not checked
☐Make sure the Service Principal Name in AD has the following Syntax: SAP/<sAMAccountName>
☐Check with CLI on a domain system: setspn -l SAPService<SID> if you get returned your SPN
☐Check with setspn -X -F to avoid duplicate SPNs
Example:
Your SAPs System ID is SA1
Your User Account in AD is SAPServiceSA1
Output of setspn -l <account>
Registered ServicePrincipalNames for CN=SAPServiceSA1,<YOUR OU STRUCTURE>,DC=<..>,D C=<..>: SAP/SAPServiceSA1
SAP System
SNC Library
☐Ensure by executing „sapgenpse“ you are using a up-to-date CommonCryptoLib 8.4.48+
☐Make sure the environment variable $SECUDIR is properly defined and points to /usr/sap/<SID>/DVEBMGS<..>/sec
Most important Profile parameters (according to the example above):
☐snc/identity/as = p:CN=SAPServiceSA1
☐snc/gssapi_lib = $(DIR_EXECUTABLE)$(DIR_SEP)$(FT_DLL_PREFIX)sapcrypto$(FT_DLL)
Clean up your SECUDIR
☐Delete credentials for SAPSNCSKERB.PSE: sapgenpse seclogin -p SAPSNCSKERB.pse -d
☐Delete SAPSNCKERB.PSE
Proceed according to the manuals (for Domain names always use UPPERCASE):
☐Re-Create SAPSNCSKERB.pse (in your post above I noticed you are missing the „S“ in the file name)
☐Re-Create Credentials for the new PSE and make sure your SAPServiceSID user and/or SIDadm is able to use that credentials
☐List the credentials for the SIDadm using: sapgenpse seclogin -l (optionally with -O <SAPServiceSID>)
☐List the keytab and make sure you have 4 entries: sapgenpse.exe get_my_name -p SAPSNCSKERB.pse
Clean up your STRUST
☐Do NOT import the SAPSNCSKERB.pse into STRUST. Move to STRUST select SNC SAPCryptoLib and right click + delete
You do not need this in STRUST as it would only be required for X.509 based SNC. As the SAPSNCSKERB.pse does not contain any X.509 key pairs and certificates, you receive that error message (unable to determine public key algorithm).
Restart your ABAP System and check dev_w0 to ensure SNC was initialized correctly
SAP GUI Client
On the enable SNC. On the SNC Name enter: p:CN=SAP/SAPServiceSA1 which reflects your SPN syntax.
Regards,
Carsten